Jerusalem of Europe, Jerusalem of the Balkans, Rajvosa

Forty-five days after leaving Pasadena, Sheldon finds himself in a train station in Kingman, Arizona with all of his possessions stolen. He calls Leonard to pick him up, and he brings Amy with him. Heading home, Sheldon says that he never left any of the train stations during his journey. Amy is hurt he left without telling her, and that he called Leonard for help. Sheldon is not happy that she is there, and says he did not call her because he was too embarrassed to admit that he could not make it on his own; Amy accepts that he is not perfect. Sheldon thinks his trip has left him ready to deal with change, but he immediately walks out of the apartment when he sees Penny's new haircut.

Bernadette gets Penny a job interview with her pharmaceutical company as a salesperson, though Penny is very nervous about it. She does horribly in the interview, but gets the job anyway, after bonding with the interviewer over their shared fear of Bernadette.

Howard and Raj find Stuart still living with Howard's mother even though she had recovered, which is very unsettling to Howard.

Recurring characters: Kevin Sussman as Stuart Bloom and Carol Ann Susi as Mrs. Wolowitz

Malpractice Makes Perfect / Involuntary Volunteers / Mobile Masterpiece

Mitternacht - The Dark Night of the Soul

*The Untold Story - Alvin gets a story telling session by Tubby.
*Amok in the Mall - Lulu and Annie take Alvin to the barber. But problems occur when he runs away.
*The World Record - Lulu desperately tries to break a world record. Ultimately breaking the records of the most unsuccessful attempts of breaking records.

Sam Mitchell playing for Hawthorn during the 2007 AFL Season

*The Curse of the Thingamajig - The story of the so called cursed thingamajig.
*House Guest Blues - Tubby is staying with the Moppets for the weekend and he causes the family some inconveniences.
*The Monster Hunt - Tubby and Iggie see a mud monster. They get help from Lulu and Annie to try and catch it.

NSW TrainLink electric services to Port Kembla

Teleplay: Steve Molaro, Eric Kaplan, Maria Ferrari

Dummy Skeleton: David Hamburg and Mitchell Goldsmith

*Valentine's Day - Gloria is getting the boys to give her a valentine, while Lulu has none until the boys notice this.
*Gertie Greenbean - Lulu becomes friends with Gertie and they both team against Wilbur who wants to be rid of Gertie.
*Stop Fiddling Around - While cutting Onions, Lulu believes she broke her father's favourite pipe. Tubby tries to learn the violin.

Order in the Court / Maybe Use Sugar / Road Trip
Valentine's Day / Gertie Greenbean / Stop Fiddling Around
The Case of the Missing Perfume: Christel Kleitsch

Portrait of Kossinna with an example of excavated pottery.

The Untold Story / Amok in the Mall / The World Record

NSW TrainLink electric services to Waterfall

*Breakout - Marty the Midget escapes from prison again.
*The Great Golf Club Chase! - Lulu and Tubby accidentally get rid of Mr. Moppet's golf equipment and hastily get it back in time for Mr. Moppet's golf play.
*Jumpin' Jellybeans - Lulu and friends take part in a contest involving jellybeans.

*3x Premiership Player:
*4× Peter Crimmins Medal:
*2× All-Australian Team:
*J.J. Liston Trophy:
*AFL Rising Star Award:

Alvin's Record Player / Lulu's Television Debut / Crybaby
The Little Girl Who Never Heard of Ghosts: Thomas LaPierre

Collage of Sarajevo, Bosnia and Herzegovina.jpg

*The Old Master - A painter sells one of his paintings to an art museum but it is switched with a painting that Lulu drew.
*Swat Shot Pops - Lulu doesn't have enough money to buy a present for her father's birthday. So she decides to swap one of Mr. Tompkins fish trophy for one.
*Detective Story - Tubby becomes the spider again to follow a suspicious looking man believed to be a bank robber. However he is actually a detective looking for the real thief.

Bowlfinger / Great Tubbini / Shiny, Sheeny, Bouncy-Cleany

Teleplay: Steve Molaro, Jim Reynolds, and Steve Holland

*Lulu Stays Put - Lulu overhears her mother and thinks she is going to sell her house. Lulu tries to stop her by scaring away the potential buyers.
*Shoeless Lulu - There are new shoes in the market that are the latest fad, the problem is that everyone has them except Lulu.
*Star Search - A television executive is looking for someone to star in a commercial and Lulu and various other kids want to join.

Tuxedo Tango / The Football Star / Spook Delivery

Archidioecesis Kansanopolitana in Kansas

Scientific American praises the paper Leonard and Sheldon wrote together, but does not mention Leonard's name. Sheldon fails to comfort Leonard over the omission, while Penny tries to cheer up Leonard by doing some online shopping for him.

Meanwhile, Howard, Bernadette and Raj arrive at Howard's mother's home to remove some of her belongings, only to be told by Stuart the power is out. A distraught Howard realizes the last food his mother ever cooked will defrost in the freezer and be ruined. He decides to invite his friends over to eat it all, so it will be like his mother is feeding everybody one last time. At the dinner, Sheldon and Leonard argue about whether an idea's inspiration or execution is more important. Bernadette takes Sheldon and Leonard to another room and scolds them for their bickering. Howard remarks that Bernadette's yelling sounds similar to his mother's, though the others claim to not hear it. Finally, everyone is over-stuffed from eating and lazing around the house. The group expresses mild excitement upon hearing that an online publication has mentioned Leonard's name in connection to the paper, but become much more enthusiastic when Bernadette finds more Tums.

Recurring character: Kevin Sussman as Stuart
Title reference: All the leftovers that are going to spoil if they are not cooked.

Teleplay: Steve Molaro, Eric Kaplan and Maria Ferrari
Title reference: Sheldon and Amy building a blanket fort.
Story: Eric Kaplan, Maria Ferrari & Adam Faberman

Wrong Records, Alternative Tentacles, AntAcidAudio, Southern

Lancelot Jr. / Lucky Lady / Five Little Babies

Sheldon and Leonard are headed to UC Berkeley to give a lecture on the paper they wrote together. They decide to drive by Skywalker Ranch and Sheldon wants to go inside, hoping to meet George Lucas. They get past the front gate, but Leonard tells the security guard the truth. Sheldon decides to make a run for it and is hit with a Taser. They are let off with a warning and are forbidden to return. At home Leonard is initially angry, but admits it was a fun adventure and he enjoyed seeing Sheldon get electrocuted.

Meanwhile, the rest of the gang are cleaning out Mrs. Wolowiz's house for a garage sale. A dispute occurs over Howard's Doctor Who's TARDIS. They agree to decide its fate via a Ping pong match with Penny playing for Bernadette and Raj for Howard. Penny starts losing so Bernadette says Raj has to take it can buy it and he starts playing for her with Amy playing for Howard. Amy is about to win until Bernadette says she could have the TARDIS's doors to trick Sheldon into going inside her bedroom. Amy does so, but is disappointed when Sheldon runs into her bedroom dressed as the Fourth Doctor and then leaves.

Title reference: Sheldon and Leonard's intrusion on Skywalker Ranch.

Mind Your Manners: Anne-Marie Perrotta and Tean Schultz
Jumpin' Jellybeans: Alister McAlister and Stewart Silver

*Special Delivery - Lulu wonders where babies come from.
*Little Sew and Sews - The West Side Boys attack both Tubby's gang and Lulu's friends and Lulu decides to get even.
*Tubby's Doll - Tubby gets a doll from his Aunt Martha and tries to get rid of it by giving it to Lulu.

Giovanni in the Adoration of the Magi, by Sandro Botticelli

Story: Steven Molaro, Dave Goetsch & Tara Hernandez
Story: Steven Molaro, Maria Ferrari and Jeremy Howe
Note: Chuck Lorre still wrote a vanity card despite his decision last episode.
Story: Dave Goetsch, Steve Holland, Jeremy Howe, Tara Hernandez

No Pain, No Gain / On the Job / Tragic Magic

Title reference: The breakdown of communication among the guys because of Raj's project and the attempt to communicate with aliens.
Teleplay: Steven Molaro, Steve Holland & Eric Kaplan

May 22, 1877 as the Diocese of Leavenworth; May 10, 1947 as the Diocese of Kansas City, Kansas

Raj will be unable to host Christmas dinner as his father is coming to town and is depressed about his divorce. Amy hosts a Victorian era Christmas dinner instead. Her traditional party games bore everyone.

Sheldon and Amy have agreed not to exchange gifts, but Sheldon decides to get her one anyway as revenge for the dinner and kissing him in public under the mistletoe. Bernadette takes him to the mall where he gets his picture taken with Santa and a frame which includes a personalized Christmas message to Amy. To his surprise she loves it and gives him a box of Christmas cookies made from his grandmother's recipe, making them both happy and makes Sheldon wonder about the spirit of giving presents at Christmas time.

Meanwhile, Leonard and Howard are working together in a clean lab when a pigeon flies in. They are unable to get the bird out even with Raj’s help. Howard is devastated when he accidentally injures the pigeon with a blast from a fire extinguisher. Leonard tells him how to revive it; however, a crow flies in. Howard and Leonard agree to take the blame for ruining the lab together until Penny convinces them to erase their names off the sign-up sheet for the lab and leave.

Recurring characters: Brian George as Dr. V.M. Koothrappali
Title reference: Two birds invade the sterile clean room that Howard and Leonard are using for an experiment.

Title reference: Emily's reaction to Raj and Penny having "slept together" in the season 4 finale.
Story: Dave Goetsch, Eric Kaplan and Tara Hernandez
Teleplay: Steven Molaro, Steve Holland, Maria Ferrari
Teleplay: Steven Molaro, Eric Kaplan and Steve Holland

Special Delivery / Little Sew and Sews / Tubby's Doll

*Snowball War - The girls wage a snowball war against the boys. After much battling, the boys are defeated.
*Jr. Detective Tubby - Tubby goes detective to find out who is scribbling graffiti around. To Lulu's annoyance Tubby himself did it.
*Picnic Pirates - Willie and Tubby swipe the girls' picnic basket. In response they take advantage of Willie and Tubby's missing clothes.

Business Girl / The Pet Duck / Lulu's Umbrella Service

Historical writer in 19th century, Brown University, educator, Superintendent of Schools inSalem, Massachusetts

The Bear Trap / Shirley the Shadow / A Dog's Life Saver
Tubby on Ice / Dr. X's Xtremely Xcellent X-Ray Specs / Iggie's New Leaf

*Green Girl - Lulu stains her skin with green ink, which rouses a lot attention over her presumed illness.
*Rainy Day - On a rainy day, Tubby and Lulu try to visit each other, but always happen to be in the wrong place.
*Beautiful Lulu - Lulu overhears the boys saying she's homely. Mrs. Moppet gives her a new makeover which makes all the boys lovestruck.

Letitia Dean on Sharon's troubled home life

The Big Jewel Robbery / Pot Luck / The Spook Tree
The Old Master / Swat Shot Pops / Detective Story
The Great Golf Club Chase!: Joseph Mallozzi

*Malpractice Makes Perfect - Tubby gets a splinter and believing it's infected, goes to the hospital.
*Involuntary Volunteers - For school's volunteer week, Lulu and Tubby help an old lady.
*Mobile Masterpiece - Wilbur's father orders his butler, Cranberry, to get rid of his wife's elvis painting. However he must get it back after his wife gets upset.

The Beast in the Clubhouse / Gone Fishin' / Out, Out, Darned Spot

Story: Maria Ferrari, Tara Hernandez, & Jeremy Howe

Great Tubbini & Shiny, Sheeny, Bouncy-Cleany

Teleplay: Steve Molaro, Steve Holland, Maria Ferrari

Sheldon and Leonard are excited to play a board game until Amy and Penny say they are tired of doing what the guys want. Sheldon suggests they go clothes shopping since the girls want to do something the guys hate. While waiting, Sheldon mentions that he knows how to compromise because of all he does for Leonard, including still letting Leonard chauffeur him around town, although Amy is teaching him how to drive. Leonard angrily explains how difficult Sheldon can be and that he is not living with Penny, despite their engagement, only for Sheldon's sake. Sheldon apologizes and they both cry over them living apart soon. They decide that Leonard should move out gradually, and Sheldon agrees to let him start spend one night a week at Penny's and let him whistle when he isn't home. Leonard spends the night at Penny's, with Sheldon sleeping on her couch.

Meanwhile, Raj was part of a team that launched the New Horizons Space probe nine years ago, which is going to be activated. A stressed Raj spends the day with Howard and Bernadette and decides to take Howard to a Hindu temple. Howard is surprised Raj leans on religion as a scientist, but agrees to support him when they get to the parking lot. Raj verbally berates a man who dinged his car door, only to calm down when he hears his space probe is fine.
Title reference: Raj's anxiety over the Pluto space probe, which he hopes will be operational after nine years.

Oh Christmas Tree / Santa's Snowman / The Snoopers
The Unnatural / The People's Choice / SuperLulu

Story: Bill Prady, Eric Kaplan, & Jim Reynolds

Guest stars: Nathan Fillion as himself, Angela Relucio as Hostess
Title reference: The reopening of the comic book store by Stuart.

Teleplay: Steven Molaro, Eric Kaplan & Jim Reynolds

some peak hour / late night services to Sydney Central & Bondi Junction

Story: Jim Reynolds, Maria Ferrari & Adam Faberman

The Fuzzythingus Poopi / Leaves for Everyone / A Moving Experience

Sheldon claims the men have not invented anything significant recently because they had all been distracted by their girlfriends, so they plan a weekend of brainstorming. The girls use the free time to go to Las Vegas.

Reviewing their old brainstorming sessions they find only ideas that involve robot girlfriends. Next they work on the hover board from Back to the Future Part II, but keep getting distracted much to Leonard's frustration. Later at Leonard's lab they have further distractions from the internet and end up back at home watching Ghostbusters along with Leonard.

Meanwhile in Vegas, the girls are about to go out when Penny is given some home work by her boss. Bernadette and Amy leave and get drunk. When they return to their room, they find Penny still studying, but take her with them to a strip club, where Amy and Bernadette have fun while Penny keeps studying. The next morning a relaxed Penny heads to the pool and gets her revenge for last night by blinding Bernadette and Amy with the sun from the window while they both deal with extremely terrible hangovers.

Title reference: The weakening of the men's focus on their work due to their other halves.

Story: Jim Reynolds, Maria Ferrari & Tara Hernandez

Tubby Kicks the Habit: Jason Bogdaneris and Sarah Musgrave

Leonard and Penny finally meet Raj's girlfriend Emily, but Penny feels that Emily does not like her. Emily agrees to let Penny practice a pharmaceutical sales pitch on her; however, Emily ignores her pitch. Emily admits she is unhappy that Penny previously hooked-up with Raj. Raj brings the two of them together to talk and Emily apologizes for being rude; however, after the meeting both women part and it is clear that they are still very uncomfortable with each other.

Since Stuart did not get enough insurance money to reopen his comic book store, the men decide to invest in it as part owners. Penny wonders why Leonard wants to discuss finances, while Amy and Bernadette reluctantly accept the investment. Howard's mother has already given the money to Stuart and is calling him by Howard's old pet name Bubula upsetting Howard.

Finally, the men are disappointed that they are not getting a nice comfortable homey place to sit and read comic books, though that is what they are doing in Leonard and Sheldon's apartment.

Recurring characters: Kevin Sussman as Stuart Bloom, Laura Spencer as Emily Sweeney

The Popcorn Thief / The Little Tornado / She Flies Through the Air

Historical writer in 19th century, Brown University, educator, Superintendent of Schools in Salem, Massachusetts

*Tubby Kicks the Habit - Tubby makes a bet with Lulu that he can go a week without tv.
*How the West Was Lost - Lulu wins a trip to the Wild West, unfortunately Annie is so allergic to horses that she can't even watch a western movie without breaking into a rash, so the only option left is Tubby.
*Infomercial - Lulu and Tubby go to see an infomercial about exercising and health products.

*Tiny Tot's Syrup - Tired of the bad tasting Tiny Tot's Syrup, Lulu goes to the factory to lodge a complaint, which eventually makes the desired changes.
*The Night Before Christmas - Tubby's gang hatch a plan to trap Santa to get presents for themselves. A muddle occurs when Mr. Tompkins plays Santa tonight.
*The Piggy Bank Guard - Tubby entrusts Lulu to guard his piggy bank so he won't spend it yet. Lulu quits her guard work when she realises he wanted to buy a present for Gloria.

First-Aid Brigade / Matinee Madness / It's a Dog's Life

*The Big Jewel Robbery - A thief steals a bunch of jewels and after hiding them, believes that Lulu and Annie stole them.
*Pot Luck - Tubby has a fight with Willie. Meanwhile the West Side Boys plot to steal the boys clubhouse.
*The Spook Tree - Lulu overhears from Tubby about the Spook Tree and that if you make a wish on it at midnight, it will come true.

Teleplay: Eric Kaplan, Steve Holland and Tara Hernandez

No Pain, No Gain: Anne-Marie Perrotta and Tean Schultz

Story: Chuck Lorre, Jim Reynolds & Anthony Del Broccolo
Story: Jim Reynolds, Steve Holland, Jeremy Howe

*Wild Boy - Lulu and Annie set up an apple juice stand. Tubby gets an idea of dressing up as a wild boy and scaring the girls, but things go too far when the police and grown ups get involved, thinking the wild boy to be real.
*The Whistle Blower - The West Side Boys take over the club house, while the police uses whistles to alert each other instead of a siren.
*Elephant Ride - Lulu and Alvin visit a circus, but Iggie, Eddie and Willie sneaks backstage and scares off the elephant by popping a balloon. The elephant chases the children around.

SuperLulu: Lienne Sawatsky and Elana Devine
The Hat: Anne-Marie Perrotta and Tean Schultz
The Night Before Christmas: Thomas LaPierre

Guest stars: LeVar Burton as himself, Stephen Root as Dan and Paul Wilson as Professor Sharpe
Title reference: Leonard, Raj and Howard think about their own careers when finding the champagne of a deceased colleague meant to celebrate a significant breakthrough.

*Hooky Holiday - Lulu and Tubby decide to skip school.
*Red Tape Run-Around - Lulu fails her career aptitude test, she goes to the authority to report the mistake.
*Country Clubby Tubby - Tubby wins a million dollars and Wilbur invites him to a country club.

Bulldozer Blues / Telethon of Fallen Stars / What's Fair Is Fare
Castaway Kids / Wrestling Away / Never Too Late
Prisoner Exchange / The Balloon Derby / Dummy Skeleton
Polly Patrol / Money Problems / The Tubby 2000

Story: Steven Molaro, Bill Prady and Maria Ferrari

"The poodle haired daughter of the late Den and Angie Watts, Sharon was affectionately known as "Princess" by Den. Even though she was adopted she inherited the drama-queen gene from mum, Ange. She was constantly playing her parents off against each other like tennis balls. But she loved them despite living in their drunken war zone. After a troubled adolescence, Sharon emerged as an unbalanced femme fatale with a taste for bullies. She tried both Mitchell brothers, and found them wanting. When she returned to the Square after a long absence, however, it was straight back to Phil's bed that she raced."

The Curse of the Thingamajig: Joseph Mallozzi

*Alvin's Record Player - Mr. Moppet wants Lulu to put a stop Alvin's annoying music on his record player. Nothing can get Alvin to stop.
*Lulu's Television Debut - Mr. Quell wants to get back a valuable vase from Mrs. Moppet. As Lulu tries to deliver it, she appears on television.
*Crybaby - Alvin is crying for no apparent reason. Lulu and Tubby start to quarrel over men and women's capabilities until they get bored of it.

American Association for the Advancement for Science Fellow, Best Information Science book of the year award from the American Society for Information Science and Technology

Title reference: Howard not being athletic enough to deliver the first pitch a Los Angeles Angels baseball game.

some peak hour / late night services to Kiama

EIRT (National Radio Television Foundation) (1970–1975), ERT (Hellenic Radio Television) (1975–2013)

Monument of Metodija Andonov-Čento on Macedonia Square in Skopje

*Order in the Court - Lulu's class holds a trial in order to find who broke Iggie's ulkuele.
*Maybe Use Sugar - Annie's mother is not a very good cook and Annie is worried that she might wreak the bake sale.
*Road Trip - Lulu tells her school class a story about her summer road trip vacation in a Recreational vehicle, with Tubby spoiling Mr. Moppet's relaxation.

Santa's Snowman: Stephen Ashton and Thomas LaPierre

Artist, educator, dancer, and flute player.

Leonard, Raj and Howard clean out the office of the deceased Professor Roger Abbot and find a bottle of champagne meant to be opened when he made his first great scientific discovery. They take a journal with a bunch of numbers to his coworker Professor Sharpe, who reveals it is just a food diary of how many calories Professor Abbot ate. Abbot believed that he would live forever if he controlled his calorie intake. The men realize not every scientist can make great discoveries, and resolve to drink that champagne in Roger's honor if one of them ever discovers something.

Sheldon prepares his final episode of "Fun with Flags" and reviews highlights of the series including Amy dressing up as a kangaroo, Sheldon dressing up as Betsy Ross, and playing "Fwag, Not a Fwag" with Barry Kripke. LeVar Burton is Sheldon's final guest. No one comments on the series ending until one person posts that he will miss it, causing Sheldon to revive the series and open Roger's champagne in front of Leonard.

Penny and Bernadette attend a banquet for their pharmaceutical company. Their boss Dan is afraid of Bernadette. Penny makes Bernadette realize she has been verbally bullying others. Bernadette goes to apologize to Dan and starts crying when she hears how she's offended her coworkers. Dan feels bad and starts giving Bernadette what she wants again.

Recurring character: John Ross Bowie as Barry Kripke

Story: Dave Goetsch, Jim Reynolds and Tara Hernandez

*Polly Patrol - Mrs. Feeny asks Lulu to take care of her pet parrot but it runs away.
*Money Problems - Wilbur's family are losing money.
*The Tubby 2000 - Tubby decides to sell a house cleaning robot that Lulu made for a science fair.

*Tuxedo Tango - Lulu is asked by her father to pick up a tuxedo for him but she accidentally picks up officer McNabb's uniform.
*The Football Star - Tubby's gang is challenged by the West Side Boys to a football game.
*Spook Delivery - Lulu and Tubby are asked to deliver a package to an old abandoned house.

Governor Washington, Jr. (birth name), Country Boy

*The Fright Racket - Lulu must enter a haunted house for initiation if she wishes to join the boy's club.
*The Lucky Gold Piece - Lulu tries to find her father's lucky gold piece.
*Very Little Lulu - Lulu tells Alvin a story of how she shrank when she went out to play in the rain.

*Bowlfinger - Lulu and Annie bet Tubby and Iggie in a bowling game. Tubby gets his fingers stuck in a bowling ball.
*Great Tubbini - Tubby dresses up as a fortune teller.
*Shiny, Sheeny, Bouncy-Cleany - Lulu creates a new shampoo to clean pet hair.

Secretary-general of the World Jewish Congress

Stop Fiddling Around: David Hamburg and Mitchell Goldsmith

Gígjökull, Eyjafjallajökull's largest outlet glacier covered in volcanic ash

You Do the Math / The Great Escape / The Little Lola Show

Leonard announces that he needs surgery in one week because he has a deviated septum. Sheldon is appalled and doesn't want Leonard to have the surgery due to the risks. After Sheldon describes everything that could possibly go wrong with Leonard’s surgery, Leonard tells Sheldon he’ll reconsider it. Leonard then secretly goes to the hospital with Penny after a last-minute earlier appointment comes up and doesn't tell Sheldon, though Amy eventually spills the beans. Sheldon shows up in the waiting room and the hospital experiences a mild earthquake. Sheldon worries about Leonard and runs toward the operating room, hits the glass door and knocks himself to the ground. The next day both Leonard and Sheldon are home with their noses bandaged. Leonard teases that Sheldon only did what he did because he really loves him. Later, Sheldon receives morbid urns he ordered for him and Leonard. However, he is unable to return them because he had gotten them engraved with the morbid messages.

Raj is fretting over finding a gift for his parent’s 40th wedding anniversary until he learns that his parents are getting divorced and his father has moved out. Raj says little things caused them to resent each other over the years. Bernadette and Howard cheer him up, but Bernadette fears the same thing could happen to her marriage. Howard and Bernadette try to say positive things about each other, but it turns into sarcastic bickering.

Note: In lieu of the traditional vanity card at the end of the show, a picture of Carol Ann Susi was shown in remembrance.

Title reference: Leonard has deviated septum surgery against Sheldon's wishes.

The Ventriloquist: Lucie Lortie and Peter Landecker

Teleplay: Jim Reynolds, Steve Holland & Tara Hernandez

Dr. X's Xtremely Xcellent X-Ray Specs: Jacques Bouchard

Blood Ties: The Life and Loves of Grant Mitchell

Amok in the Mall: Rick Jones and John Handforth
The Fright Racket / The Lucky Gold Piece / Very Little Lulu
Space Kids & The Case of the Disappearing Drum
The People's Choice: Barbara Bryan and Paul Mullie

Sheldon and Amy decide to progress their relationship by buying a pet turtle. However, Sheldon changes his mind after it bites him and Amy is hurt when she learns Sheldon has applied to colonize the planet Mars without consulting her. Sheldon doesn't understand why she can't support the opportunity, however Amy makes him realize she wants them to plan their future together. They agree to make another application as a couple and are both amused that if they had children there they would technically be Martians.

Leonard has bought some body paint and a canvas for himself and Penny to have sex on. They are disappointed with the initial results but push themselves into making something they like. They decide to give the canvas to Sheldon by telling him William Shatner painted it.

Meanwhile, Emily leaves Raj alone in her apartment and Raj breaks a drawer while snooping. Raj fails to fix it with Howard and Bernadette listening via video call. Emily is angry, but soon forgives him and gets her revenge by scaring Raj into thinking there is something morbid in her closet.

Note: In lieu of the traditional vanity card at the end of the show, a picture of Leonard Nimoy, who passed away the previous week, was shown in remembrance.

Recurring character: Laura Spencer as Emily Sweeney
Title reference: Sheldon applying to the Mars One program.

Position of Sarajevo in Bosnia and Herzegovina

*Lucky Lulu - Lulu and Annie find a giant turkey named "Alice" and try to protect her from Tubby's gang and Mr. Moppet.
*Pieces of Eight - Lulu, Tubby and Alvin go to the beach and hear about a hot dog contest.
*Jumping Beans - Both Lulu and Tubby have to run errands. They trick Iggie into doing them.

Map highlighting Rockcreek Township, Bartholomew County, Indiana.svg

Dancin' Fools / Hop Hazard / Stage Fright

*Spaced Out - In a planetarium, Lulu and her friends go a space voyage, which turns out to be a space simulation experience.
*Switched at Birth - Lulu with Tubby sees a woman in the market who looks just like her.
*The Great Outdoors - Lulu and her friends have a camp out in her backyard. Tubby and his friends try to ruin their fun.

Potato Kids: Thor Bishopric and Todd Swift

Note: On the vanity card at the end of the episode, Chuck Lorre announced it will be his last vanity card.

*The Beast in the Clubhouse - The clubhouse is infested by a bird, who keeps on attacking the boys to keep them away from her nest.
*Gone Fishin' - Lulu and Tubby go fishing. Lulu has a dream that a merman tries to eat her.
*Out, Out, Darned Spot - Lulu and Tubby try to clean off a stain from the carpet, making a bigger mess than before.

Lucky Lulu / Pieces of Eight / Jumping Beans

Clockwise from top: Downtown Sarajevo, Sebilj, Orthodox Cathedral of the Nativity, Sacred Heart Cathedral, Gazi Husrev-beg Mosque, and Latin Bridge.

*Bicycle Built for Too Many - Someone stole Tubby's bicycle and he believes that Butch of The West Side Boys stole it after seeing him use a similar bike.
*Tax Time Trouble - Wilbur's mother hosts a charity event.
*Mayor for a Day - Lulu is appointed as the Mayor of the city for a day.

After Penny gets a company car she sells the one that Leonard gave her in "The Friendship Turbulence", and gives him the money, it bothers Leonard and leads to a conflict between the two. They later share a dinner with Howard and Bernadette to seek their counsel on marriage and finances, but this in turn leads to an argument between Bernadette and Howard over money. Leonard and Penny decide to use it as an example of what not to do in their marriage and finish having sex on the money. Bernadette and Howard eventually make up as well.

Raj and Sheldon see a chance to study dark matter by participating in experiments conducted in a salt mine. To test themselves, they crawl into a hot, sweaty steam pipe tunnel in the university basement with Amy waiting above ground. Sheldon fights several phobias including fear of enclosed places. He also reveals his fear that his new research will fail him like string theory did. Raj consoles him by relating his own fear when he first left India. When some rats show up Sheldon abandons Raj, who later excoriates Sheldon for doing so. Their simulation lasts eleven minutes.
Title reference: Sheldon and Raj simulating working in a salt mine by crawling into the steam pipe tunnel.

*Gilbert the Gorilla - Lulu visits the zoo wearing a strong aroma which makes Gilbert the Gorilla attracted to her.
*Snow Business - Lulu and Annie compete against the boys to make some money off snow shovelling people's sidewalks.
*The Case of the Egg in the Shoe - Lulu is accused of putting an egg in her father's shoe, but Tubby's investigation reveals it was a chicken.

Story: Steve Holland, Maria Ferrari & Tara Hernandez

Wild Boy / The Whistle Blower / Elephant Ride

*Space Kids - Tubby's gang trick Annie and Lulu that their make-belief rocket ship and the trip to Mars is real and the two girls respond with their own trick.
*The Case of the Disappearing Drum - Tubby thinks Mr. Moppet took Alvin's drum and tries to prove Lulu he is right, all the while making Mr. Moppet go distracted.
*From Hero to Zero - Without any luck getting Gloria's attention, Tubby tries to be a hero by saving Lulu, but Lulu takes credit for his heroic deeds.

Work on scholarly communication, scientific information, and bibliometrics

Title reference: The solution that allows Sheldon to keep working at the university is becoming a Junior Professor.

*Castaway Kids - Lulu and Tubby along with Annie and Iggie head to a island for a picnic but they get stranded on it.
*Wrestling Away - Tubby becomes a professional wrestler.
*Never Too Late - Lulu's friends are busy reading a book for a test and she tries many ways to get out of reading it.

*Alvinsitting - Lulu is asked by her mother to babysit Alvin.
*Two Lulus - Lulu tells Tubby's gang a story about Mr. Winkle who turns kids into mannequins. They believe her when they see a mannequin of Lulu herself.
*The Hat - Lulu and Tubby wreak her mother's new hat and try to fix it.

*The Bogeyman - Lulu tells Alvin a story about how she met the Bogeyman.
*Tattoos - A new tattoo parlour opens. The idea of children having tattoos causes an uproar from their mothers, but the tattoos are only pictures.
*Mimibur - Lulu and Annie dress Wilbur as a girl and send him to his own party, causing him a lot of humiliation.

Space Kids / The Case of the Disappearing Drum / From Hero to Zero
The Beast in the Clubhouse: Christel Kleitsch
Gilbert the Gorilla / Snow Business / The Case of the Egg in the Shoe

*The Popcorn Thief - Tubby is hired for detective work at Annie's home cinema, enduring a girly night. It turns out he's in league with the popcorn snatchers Iggie and Willie.
*The Little Tornado - Believing Lulu has super strength, Tubby permits her into his club. When they assign her to take care of the West Side Boys, a small tornado takes care of them.
*She Flies Through the Air - Lulu and Tubby go skiing at Hilltop Mountain. Accidental mishaps going downhill make Lulu an honorary ski champion.

*Lancelot Jr. - When Wilbur decides to wear Sir Lancelot Jr.'s suit of armor for fun, Lulu and Tubby want to join in on it.
*Lucky Lady - When a woman in the newspaper offers to give $10 to a child if he or she can prove to be nice, the kids of the town scrabble to clean up their act.
*Five Little Babies - After Lulu gets pranked by Wilbur and the boys, she and Annie get back at them by stealing their clothes and dressing them up in diapers.

Teleplay: Eric Kaplan, Jim Reynolds, & Steve Holland

The Curse of the Thingamajig / House Guest Blues / The Monster Hunt
Tubby Kicks the Habit / How the West Was Lost / Infomercial
Tiny Tot's Syrup / The Night Before Christmas / The Piggy Bank Guard

*The Bear Trap - Lulu, Tubby, and Wilbur foil a pair of thieves trying to steal his father's money.
*Shirley the Shadow - Lulu tells Alvin a story about a little girl who lost her shadow.
*A Dog's Life Saver - Lulu wants to have a dog. She tries to stop a dog catcher from capturing a stray.

Snowball War / Jr. Detective Tubby / Picnic Pirates

Nomeansno live in Tampere, Finland in 2007

*Tubby on Ice - When sledding down dead man's rock, Tubby becomes buried in snow and wakes up in the future.
*Dr. X's Xtremely Xcellent X-Ray Specs - Tubby tricks Alvin into trading a rare card for a pair of glasses that supposedly give x-ray vision.
*Iggie's New Leaf - Iggie's mother threatens to sent her son to military school unless he learns to stay out of trouble.

Teleplay: Jim Reynolds, Steve Holland and Dave Goetsch

Bulldozer Blues: Sarah Musgrave and Jason Bogdaneris

EIR (National Radio Foundation) (1938–1970)

Story: Chuck Lorre, Eric Kaplan & Jim Reynolds

Pavlyuchenko, Roman Anatolevich; Роман Анатольевич Павлюченко (Russian)
Pavlyuchenko, Roman Anatolevich; Роман Анатольевич Павлюченко

Major for a Day: Anne-Marie Perrotta and Tean Schultz

Modified M14 iron sights, normally used with a magnifying scope.

"Capital del Paraíso" - "Paradise's Capital"

Story: Jim Reynolds, Saladin Patterson, Tara Hernandez

Anna-Varney Cantodea except "La Prima Vez" Traditional.

*Potato Kids - Lulu unleashes a potato frenzy when she finds one that resembles Tubby.
*The Ventriloquist - Tubby starts to mimic voices.
*Bunny Fun - Tubby has to perform in a play while wearing a bunny costume.

The Popcorn Thief: Thomas LaPierre and Joseph Mallozzi
The Case of the Missing Wig: Jean-Charles Finck

Title reference: Sheldon's train adventure is interrupted when his belongings are stolen.
Story: Steven Molaro, Tara Hernandez and David Saltzberg, Ph.D

She Flies Through the Air: Robert Browning
Blackout / Mind Your Manners / To Tell the Tooth

Sheldon has a problem in his dark matter Proton decay research. After Penny says doing a fitness routine she hates motivates her, Sheldon seeks to do the same with his anxiety level while he works. The guys enjoy irritating Sheldon when he asks them to do so, while he annoys the women when he tries to listen to their mindless girl talk. Sheldon becomes exhausted and hallucinates among other things. A frustrated Amy throws him out of her apartment when he focuses on his research and anxiety during their date night. On the bus home he hallucinates a man is really a mix of an Armadillo and Isaac Newton. Leonard and Penny are able to get an exhausted Sheldon to sleep after singing Soft Kitty to him. Sheldon is able to continue his research afterwards.

Meanwhile, Howard has invented a game 'Emily or Cinnamon' where the rest of the friends try and guess whether an embarrassing quote from Raj was said to his girlfriend or his dog. Raj is annoyed, but Emily is okay with it, thinking it is sexy that Raj is sensitive. She kisses Raj and is turned off by the dog hair in his mouth.

Recurring characters: Laura Spencer as Emily Sweeney, Ed Lieberman as Man
Title reference: Sheldon seeking the perfect anxiety level to motivate a breakthrough in his research.

"Lucy In The Sky With Diamonds" by Dan Torres

*The Unnatural - A new kid joins the school soccer team.
*The People's Choice - Lulu goes up against Wilbur in the school election.
*SuperLulu - Lulu imagines herself as a superhero, with her sidekick Annie and Tubby as the villain who has taken over every TV channel that broadcast programs starring Tubby himself.

Potato Kids / The Ventriloquist / Bunny Fun

Howard is asked to throw out the first pitch at a baseball game for the LA Angels of Anaheim, as an astronaut, to celebrate Space Day. Despite practicing, he cannot reach home plate. At the game Howard decides to use a prototype of the Mars rover to deliver the ball, but the Rover moves so slowly across the grass to deliver the ball that Howard is booed by the crowd and his friends in the stands.

Earlier Sheldon and Amy are joined by Penny and Leonard on a double date at a pub, and are baffled when Sheldon says the Shamy relationship is the stronger of the two, because they scored an 8.2 out of 10 on a scientific test used to measure a couple's compatibility. Leonard wants to take the test, but Penny refuses, worried that she and Leonard have nothing in common even though they are engaged. Leonard admits he shares this fear, but says it only strengthens his resolve that they can face it together. Penny is overwhelmed by Leonard's commitment, while Amy wishes Sheldon would say romantic things like that to her. Sheldon tells her that she should trust him that she is already happy because of their test score.

Recurring character: Michael Massimino as himself

Lulu Stays Put / Shoeless Lulu / Star Search

Teleplay: Steven Molaro, Eric Kaplan & Steve Holland

Bicycle Built for Too Many / Tax Time Trouble / Mayor for a Day

*The Big Egg - Tubby charges kids who want to see an egg shaped rock.
*The Little Girl Who Never Heard of Ghosts - Alvin locks Lulu in the room and forces her to tell a ghost story. Lulu then tells him the story of a girl who has never heard of ghosts.
*The Case of the Missing Perfume - Lulu hires Tubby to find her mother's missing perfume.

The Night Before Christmas: Robert Browning

*Blackout - A snowstorm causes a blackout across the city.
*Mind Your Manners - Tubby accidentally received an audio record of good manners, he tries to use it impress Gloria.
*To Tell the Tooth - Lulu has a loose tooth and she tells her friends. However her friends misheard her and this leads to a bunch of rumors.

Story: Jim Reynolds, Tara Hernandez, Jeremy Howe
Story: Chuck Lorre, Dave Goetsch & Anthony Del Broccolo

*Prisoner Exchange - Marty the Midget, a criminal who looks like Tubby, escapes from prison and switches places with him.
*The Balloon Derby - A contest is held to see how many balloons can be caught.
*Dummy Skeleton - Lulu with Annie and Tubby with Iggie have mix up between a mannequin and a skeleton delivery, which also causes quite a commotion.

Smith Enterprise Inc.
CheyTac Firearms, COLT DEFENSE SYSTEMS,

Story: Jim Reynolds, Maria Ferrari and Jeremy Howe

Friends and Enemies / The Beauty Contest / Rich Little Poor Boy

Sharon Rickman biography provided by the BBC

Member of the Legislative Assembly of Ontario for Middlesex North

*You Do the Math - Lulu gains a mysterious calculation power enabling her to go through math quizzes successfully.
*The Great Escape - Tubby's gang and Lulu try to get their hockey champion Arlin out of detention, but land themselves in trouble.
*The Little Lola Show - Lulu and her friends work at the TV Studio to produce the 'Little Lola Show' sitcom, but it gets cancelled.

Author, journalist, and political activist

Teleplay: Eric Kaplan, Jim Reynolds and Steve Holland

The Great Escape: Kim Segal and Daryl Brown

Story: Steven Molaro, Eric Kaplan & Steve Holland
Teleplay: Steven Molaro, Eric Kaplan, Jim Reynolds

Iggie's New Leaf: Sarah Musgrave and Jason Bogdaneris
Spaced Out / Switched at Birth / The Great Outdoors

Leonard has a revelation about Superfluid vacuum and presents his theory to Sheldon who approves. Sheldon writes a paper on their work and they post an online paper together. It is well received except for one troll who makes disparaging comments. Sheldon challenges this person, but panics when he tries to Video call him. Leonard and Sheldon decide to stand up for themselves and are stunned when their harasser is revealed as Professor Stephen Hawking who commented negatively out of boredom and actually liked their paper.

Meanwhile at Penny's apartment the girls spend the night embarrassing each other. They first watch the terrible gorilla movie that was Penny's last acting job. Then Penny finds some video footage of a younger Bernadette in a beauty pageant. And finally Bernadette reveals Amy's romantic Fanfiction of Little House on the Prairie theme about her and Sheldon. The women become invested in the story. Leonard also enjoys Penny reading the fan fiction to him, but stops before a sex scene.

Guest stars: Jim Meskimen doing two different voice characters, Stephen Hawking as himself
Title reference: A troll leaving nasty comments on Sheldon's and Leonard's online research paper.

The Unnatural: Anne-Marie Perrotta and Tean Schultz

Puerto Baquerizo Moreno, San Cristobal, Galapagos Islands, Ecuador

Bowlfinger: David Hamburg and Mitchell Goldsmith

Guest stars: Matt Bennett as Josh, Kevin Smith Voice-over as himself

The Case of the Disappearing Drum: Ken Ross
The Dance / Locked Out / The Kissing Game
Hooky Holiday / Red Tape Run-Around / Country Clubby Tubby

Teleplay: Jim Reynolds, Maria Ferrari & Tara Hernandez

*Business Girl - The boys start up a plot to ruin Lulu and Annie's lemonade stand, but their plans backfire.
*The Pet Duck - Lulu takes a wild duck home for a pet. Tubby tells Lulu that Daffy the Clown was missing his own pet duck Wilfred.
*Lulu's Umbrella Service - Wilbur gets umbrella service from Lulu which is quite troublesome for Lulu, but eventually the joke's on Wilbur.

She Flies Through the Air: Brian Cameron Fuld

Leonard has been asked to give the graduation speech at his old high school in New Jersey and is excited to bring Penny with him; however their flight is cancelled due to bad weather. Penny arranges with the school to broadcast Leonard's speech over Skype and buys him a "sexy graduate" costume for a graduation cap and gown. Leonard's speech starts out boring so he changes it as he reflects on his own high school life. He explains to the smart and forgotten kids that after they graduate the world will find them far more interesting than the popular students.

Raj has bought a quadcopter, but is unable to get it to work so he brings it to Howard and Sheldon. Raj's father is outraged at the cost of it so he cuts off Raj's allowance; however, Raj is able to leverage his parent's divorce as a way to get them both to separately send him more money. Howard tears the helicopter apart, but is unable to get it to work. The guys begrudgingly call tech support like Bernadette suggested. While on the phone the helicopter activates itself after receiving a random signal and flies wildly around the apartment terrorizing everyone.

Recurring characters: Brian George as Dr. V.M. Koothrappali, Alice Amter as Mrs. Koothrappali
Title reference: Leonard's speech being transmitted over Skype.

Sheldon is allowed to study what he wants in exchange for becoming a junior professor and teaching a class; he is not happy, and nobody signs up for his class because of his reputation. Howard decides to take the class to work on a doctorate, but Sheldon focuses on areas of physics that Howard does not understand to humiliate him. Howard gets him back by being a horrible student leading to an incident where he shoots a spitball into Sheldon's mouth, causing him to be reported to Human Resources. After dropping the class, Howard asks Sheldon engineering questions which Sheldon answers. The men eventually heal by celebrating their own genius, and asking each other questions.

Meanwhile, Bernadette feels Penny should start studying for her pharmaceutical job, but Penny wants to wait, which leads to tension. Amy loves being in the middle, pretending to agree with both of them. Now she can spend time with each one alone, and increase her bond of friendship by trash talking about the other woman and feeling immensely popular. Her good times are short-lived when Bernadette and Penny apologize to each other, and Amy ends up eavesdropping on her friends to see if they are getting along.

Recurring character: Regina King as Janine Davis

* Carassiops klunzingeri (J. D. Ogilby, 1898)

film director, film producer, screenwriter

Breakout / The Great Golf Club Chase! / Jumpin' Jellybeans

"Poor old Sharon, sometimes she doesn't know which way to turn. She loves both her mum and her dad, but they always seem to be at odds with one another. And being adopted doesn't help much either. Sometimes she feels very insecure—no wonder she goes over the top now and again!"

Amy has read about an experiment claiming two people can fall in love by asking each other a set of personal questions and staring into each others eyes for four minutes. Sheldon and Penny try it in her apartment. Penny reveals she wishes she was as smart as her friends and Sheldon wishes he had Penny's ability to understand social interaction and letting Penny know the secret that his birthday is that day. They do not fall in love but happily reflect on their friendship. Sheldon is startled when his friends throw him a surprise party when he returns home.

Raj, Emily, Leonard and Amy try a bit of interactive theater where participants have to solve puzzles to get out of a room. The four are disappointed after their scientific skills solve everything in six minutes.

Meanwhile, Howard and Bernadette are at the airport having returned from his mother's funeral in Florida and are outraged the airline has lost her ashes. Howard feels guilty he unknowingly rejected his last chance to talk to his mother by not driving her to her flight. He is relieved when her ashes are found but Bernadette worries he will put them in their bedroom.

Recurring character: Laura Spencer as Emily Sweeney

Guest stars: Max Adler as The Zombie
Title reference: The emotional intimacy test taken by Sheldon and Penny.

Sheldon is depressed because he was left out of a group attending a symposium at the home of Richard Feynman. On date night he mentions to Amy how his siblings left him out of building a blanket fort as kids. They decide to build their own in the living room and Sheldon has so much fun he agrees to let Amy spend her first night with him in a platonic sleepover. Amy had left a pre-positioned sleepover kit in the apartment just in case.

Wil Wheaton has Penny on his podcast to talk about the terrible movie they worked on together, "Serial Ape-ist 2". Kevin Smith calls to offer her an audition for Clerks III. Leonard, who is not thrilled with her risking her good pharmaceutical job, is stunned when he learns she makes twice the money he does and is being more mature than him. Penny says she will do something immature by going to the audition, tricking Leonard into supporting her possibly acting again.

Howard now owns his mother's house after his father Sam signed it away with no contact. While discussing future plans with Raj and Bernadette, Howard is shocked when he is visited by a half-brother, Josh. Howard wants him to leave, but they bond over Howard being an astronaut and his lustful past with a robotic arm.

Recurring character: Wil Wheaton as himself

Teleplay: Steven Molaro, Steve Holland, & Maria Ferrari

*No Pain, No Gain - During a game of hockey, Tubby pretends to injure his leg and has Lulu do some favours for him.
*On the Job - On career day, Lulu becomes a news reporter.
*Tragic Magic - Tubby and Lulu performs in a magic show.

*Bulldozer Blues - Construction workers plan to destroy Tubby's clubhouse and build a building over it.
*Telethon of Fallen Stars - Lulu's soccer team must sell cookies in order to enter the national championships. Lulu and her friends host a telethon to raise money.
*What's Fair Is Fare - Lulu's class holds a fair in order to raise money.

Sheldon meets the middle-aged Dr. Lorvis who tracked down a flirty pharmaceutical sales rep, Penny. Leonard explains to him that Penny is his fiancée, so he walks away looking sad. Sheldon invites him inside for a hot beverage. He is a celebrity urinary specialist with a huge memorabilia collection which he invites the men to see. After Sheldon teases that the Penny-Leonard relationship is doomed to fail, Dr. Lorvis locks them in his basement to go after Penny again. He falls for Amy and then Bernadette. Penny explains to him that he is acting creepy, and cannot chase every woman that is nice to him. The girls march him back to let the men out, who are too busy playing Donkey Kong to notice.

Earlier Bernadette tells the girls that she has been picked as one of the fifty most beautiful scientists for an article in a magazine. The magazine cancels the article because Amy wrote an email of complaint about the article since they would not have written about handsome male scientists and are objectifying women. Bernadette claims Amy is jealous because she cannot express her sexuality. Bernadette returns to apologize when she gets hit on by Dr. Lorvis.

Guest star: Billy Bob Thornton as Dr. Oliver Lorvis
Title reference: Penny's flirting causing Dr. Lorvis to misinterpret Penny's interest in him and then irritate the women.

*The Dance - Gloria invited Tubby's gang to the dance and Lulu, Annie and Margie stop her with monkeys.
*Locked Out - Lulu is locked outside her house in the night and tries to get back in.
*The Kissing Game - Tubby makes a bet with Wilbur that Lulu can kiss him.

Story: Steven Molaro, Eric Kaplan & Tara Hernandez

*The Fuzzythingus Poopi - Lulu tries to find a gift for her mother's birthday.
*Leaves for Everyone - Lulu is asked by her father to rake leaves and she tries to trick Tubby's gang into doing it.
*A Moving Experience - Lulu overhears her parents and believes she is moving away.

Teleplay: Steven Molaro, Steve Holland & Maria Ferrari

*Friends and Enemies - Two surprises await Lulu when she invites her enemies to her birthday party and her friends don't come.
*The Beauty Contest - The boys start up a beauty contest and Gloria bribes them to make her the winner. Lulu makes sure that is not to be.
*Rich Little Poor Boy - The newspaper publish that Lulu is in love with Gregory Gallant and Lulu tries to clear her name.

*The Case of the Missing Wig - Someone stole Annie's wig for her doll and Lulu asks Tubby for help.
*Froglegs - Lulu and Tubby try to find frogs to get Froglegs.
*A Wrong Move - Lulu tries to find wood to help her father build a book shelf.

Guest star: Kara Luiz as Jeanie
Title reference: Amy and Bernadette decide to redo their high school prom on the roof since no one, except Penny, had good memories of theirs.

*Boy Cannon Ball - Lulu is very skeptical about Tubby's cannon firing stunt. Lulu exposes the elements of the boys' trick.
*Noses Off - Wilbur frames Lulu for breaking the nose off an antique bust. Wilbur's mom loves the look of the bust from Lulu and Annie's handiwork.
*Hairy Day - Lulu and Tubby try to mix a formula to grow Lulu's dad some hair, but instead it stains his head blue. However the tonic they made actually works, only too well.

*Iggy and the Ice Cream Factory - Iggie's idea gets selected as a new flavor by an ice cream company.
*Game Show Gaffe - Lulu's father enters in a game show.
*Art Frenzy - Lulu's class goes on a field trip to a art museum.

Iggy and the Ice Cream Factory: Jacques Bouchard

*Dancin' Fools - The school holds a dance contest.
*Hop Hazard - Lulu and Annie take home a rabbit but trouble soon starts when it begins to multiply.
*Stage Fright - Lulu directs a play, with her friends as cast members.

*First-Aid Brigade - Lulu and Annie along with the other members of the squirrel scouts try to earn their first-aid patch.
*Matinee Madness - Lulu and Tubby work at a movie theater.
*It's a Dog's Life - Tubby has to take care of his Aunt Martha's dog. He gives it to Lulu to take care of it.

The Big Jewel Robbery: Anne-Marie Perrotta and Tean Schultz

Raj is working on a proposal for NASA to design a message from Earth and its delivery system to hopefully be found by an Alien life form. He asks the guys for advice and Sheldon and Howard try to take control, so Raj invites only Leonard to work with him. The two realize Sheldon and Howard's ideas were good and ask them to work with them after all. The guys talk about times where they have individually felt excluded from fun group activities while working together on the message. Their message is found by aliens who think Sheldon looks delicious.

Penny is unsure whether she should risk her new career for a chance at acting again and goes to Sheldon for advice. At first Sheldon will not tell her what to do because people think he is too controlling. Penny uses his love of trains in an analogy to get him to say she should go to the audition, but not decide on any major career change yet. Penny's audition goes terribly while she also remembers she hates the petty environment around other actresses. Penny thanks Bernadette for getting her the good pharmaceutical job and takes her on a special dinner after Bernadette's prodding.

Guest stars: Sara Erikson as Gwen and Kelli Goss as Chelsea.

Mostovskoy, Krasnodar Krai, Soviet Union

Teleplay: Jim Reynolds, Steve Holland & Maria Ferrari

The Case of the Missing Wig / Froglegs / A Wrong Move
The Big Egg / The Little Girl Who Never Heard of Ghosts / The Case of the Missing Perfume
Iggy and the Ice Cream Factory / Game Show Gaffe / Art Frenzy

Barry Kripke stops by to thank Amy for helping him with her ideas on string theory, which bothers Sheldon because she never helped him out when he was working on it. He complains to Penny who tells him to "let it go". Instead, Sheldon reveals that Amy was secretly performing experiments on Penny and Leonard and comparing the results with those of a chimpanzee, infuriating Penny.

Leonard and Raj run into Nathan Fillion at a deli, but he denies he is an actor so he can eat in peace. Later, he admits who he is and offers to take a picture with them. Raj asks so many questions to verify Fillion's identity that he looks annoyed in the photo.

Stuart has opened his new comic book store, which impresses everyone except Howard who finds him using the den furniture that his mother had given him. Howard gets a call from Florida where his mother is visiting, and receives news that she died in her sleep. Everyone, including Sheldon, goes to comfort Howard. After he and Bernadette leave for Florida, the rest of the gang remember and toast the passing of Mrs. Wolowitz, calling her "everyone's mother".

Recurring characters: John Ross Bowie as Barry Kripke, Kevin Sussman as Stuart

*Oh Christmas Tree - Lulu and her father go to the forest to cut a tree for Christmas, which doesn't come free like they thought.
*Santa's Snowman - Lulu and her friends are met by Santa's Snowmen, actually Tubby's gang cheating them out of their money, but they learn that giving things is more important.
*The Snoopers - Lulu and Tubby receive presents that they don't want. This is just a game Mrs. Moppet and Mrs. Tompkins are playing to teach their children not snoop for presents.