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Leonard and Raj take Wolowitz to Las Vegas to help him get over his break-up. Sheldon locks himself out and has only one other place to stay: Penny's.

Stuart asks Leonard's advice for a date with Penny. Wolowitz realises there's an error in a toilet he designed for the International Space Station.

The guys receive a prestigious offer to work over the summer at the North Pole, and Penny's resultant behaviour leaves Leonard unsure if he should go.

Discovering Leonard, Raj and Howard fudged the results of his Arctic research expedition, a disgraced Sheldon heads home to Texas.

Sheldon and Howard wager comic books over a cricket's species. Meanwhile, a less-than-perfect romantic night agonizes Leonard and Penny.

Howard takes Raj along to check out the Goth dating scene. Sheldon uses chocolate as part of a behaviour modification experiment on Penny.

Facing a return to India, Raj needs a job desperately enough to consider working for Sheldon. Howard becomes a third wheel to Leonard and Penny.

Sheldon looks forward to squaring off against a Star Trek actor in a fantasy card game tournament. Wolowitz cashes in on an old pact with Leonard.

Forrest and Sheena's families meet. Jovon and Annalynn don't see eye to eye. Laura grows suspicious of Birkan. Rick is unsure about having more kids.

Jim feels ganged up on when Georgie and Audrey make changes to the tire store, and Mandy helps Georgie navigate a fight between her parents.

Mandy finds out Meemaw runs an illegal sportsbook and wants in on the action. Meanwhile, Georgie struggles to keep Mandy's new job a secret.

Don has a case of crippling psoriasis that has completely taken over his body. Jeff has a huge growth over his spine that looks like a hunchback.

Pimple Popper. Angelina's huge chest lump affects her love life and Delano has a football-sized mass on his back. Plus, Carla hopes to get painful cysts removed from her scalp.

At 42 years old, Angel is staring death in the face. She is struggling to make a positive change and be an active part of her partner and son's lives.

Suffering from flesh-eating bacteria and weighing almost 800-lbs, Charity relies on her family. When bad news threatens her weight loss can she carry on.

Kleinfeld, Here I Come! Morgan worries her mum will reject her dress three months before her wedding. Elaina must take back control of her appointment from her bossy sister.

Brides have high expectations and occasionally there are shocking moments in the salon. Randy looks back at some of the best moments this season.

Sheldon struggles with the first signs of puberty while his parents hunt for new jobs, and Georgie and Meemaw take a business trip across the border.

Nine-year-old Sheldon learns that his high intelligence isn't always helpful growing up in East Texas, where church and football are king.

To appease his worried mother, Sheldon employs the techniques of a self-help book to try and make a friend.

When George Sr. is rushed to the emergency room, Meemaw comes to babysit. And the kids have an adventure getting to the hospital on their own.

Sheldon refuses to eat solid food after a choking scare but finds solace in a new interest after he discovers comic books.

A Solar Calculator, A Game Ball. Sheldon uses his statistics skills to help his father coach the football team. Both Sheldon and Georgie struggle with the popularity this brings.

Jim feels ganged up on when Georgie and Audrey make changes to the tire store, and Mandy helps Georgie navigate a fight between her parents.

Mandy finds out Meemaw runs an illegal sportsbook and wants in on the action. Meanwhile, Georgie struggles to keep Mandy's new job a secret.

Penny hosts a Halloween party, putting Leonard, Sheldon, Wolowitz and Koothrappali through a new test of their social skills.

When Wolowitz goes AWOL with one of her friends, Penny's recruited to fill in for him on the guys' Halo team.

Raj's parents set him up on a blind date, and when he discovers he can talk to her, she shows interest in Sheldon.

When they're invited to present at a physics conference, Sheldon's reluctance to share the credit leads to a tiff between him and Leonard.

Leonard and Sheldon each lie to avoid hearing Penny sing in a production of Rent. However, Sheldon's lie becomes a bit too complicated.

With his friends knowing how sour he acts when sick and avoiding him as a result, Sheldon is nursed by Penny, who hasn't a clue what she's in for.

With Sheldon rattled after meeting Dennis, a teen physicist who's smarter than he is, the rest of the guys search for a way to eliminate the threat.

Sheldon finds himself booted from the gang's Physics Bowl team and replaced with Leslie, so he forms his own team hoping to prove he's superior.

When the delivery of a full-size prop of 1960's 'The Time Machine' causes Penny to miss work, she scolds Leonard about his sci-fi collectibles.

The gang fall for Sheldon's twin sister, and Leonard's plan to win her heart is derailed when Sheldon declares he'll decide who can date her.

Penny wants to throw a surprise party for Leonard, but Sheldon's indulgence at an electronics store throws her off-track.

Penny's breakup spurs Leonard to summon the courage to ask her out, and they both go to Sheldon for advice on their upcoming date.

Penny opens up to Sheldon after a less-than-stellar first date with Leonard, placing him in the uncomfortable position of having to keep a secret.

Seeing Penny with another guy sends Leonard back to Leslie Winkle, much to Sheldon's dismay.

Penny becomes addicted to an online game based on the world of Conan the Barbarian and persistently pesters Sheldon for advice.

Full of confidence following being named one of People's 30 to Watch Under 30, Raj hits on Penny and becomes impossibly arrogant.

An intervention is used to try to force Sheldon to overcome his fear of driving.

Sheldon and his friends are mystified when a younger undergraduate student is attracted to him.

When Sheldon bans Penny from the apartment, she decides to retaliate. Howard and Raj search for the America's Next Top Model house.

Sheldon wants to use an alternate version of rock-paper-scissors to help resolve conflicts. A girl Wolowitz has a major crush on falls for Leonard.

Dara Ó Briain introduces topical chat and laugh out loud games with guests Rhys James, Ed Byrne, Glenn Moore, Sara Pascoe and Emmanuel Sonubi.

Soon-to-be-married Peter's lack of male friends prompts him to undertake a quest to find true 'bromance' so he can have a best man at the wedding.

A Patch, A Modem And A Zantac. After being dismissed in class, Sheldon is determined to prove a visiting NASA representative wrong and starts studying theoretical physics.

A Brisket, Voodoo And Cannonball Run. Meemaw refuses to give George Sr. her brisket recipe. The kids try to think of ways to resolve this family feud.

Melissa covered her huge lipoma with a sweatshirt for years. Tyler's fear of cancer stopped his head lumps being diagnosed and Tahj is covered in painful boils.

Laura has used food to cope with her emotions for too long. Confined to a wheelchair, she depends upon her husband and mother to survive. Can she turn her life around.

Marla is so heavy she cannot stand up. Bedridden, she must face the facts about her health and the toll it takes on her supportive family, if she is to save her health.

Kerry's outrageous entourage keeps stealing her spotlight! Gretchen needs a gown all four of her sisters will love, and Alex questions her dress choice.

Is Anyone Listening To Me? Kayla's family threatens to take over her appointment. Milan considers getting a customised dress. Prashanthi's fitting doesn't go according to plan.

George takes his sons to see a space shuttle launch. Meanwhile, Mary, Meemaw and Missy have a girl's night at the salon.

George Sr. makes a deal with Sheldon to tutor his brother when Georgie's poor grades threaten his place on the football team.

Sheldon interviews with a school for gifted children. Much to their surprise, the rest of the family struggle with his absence.

A worried Mary sends Sheldon to Sunday school after she finds him playing Dungeons & Dragons with Tam and Billy.

Sheldon asking for a computer has unforeseen consequences for his parents, prompting Mary and the twins to move in with Meemaw.

Sheldon's germophobia lands him in detention when flu season hits Medford and he takes extreme measures to remain healthy.

Sheldon is over-exuberant that Leonard finally has a girlfriend matching his high standards.

Leonard seeks Penny's counsel when his relationship with Stephanie takes. Sheldon's hypochondriac tendencies get the better of him.

Sheldon irks the gangs with his obsession with proper Christmas gift protocol. Leonard's crushed when Penny dates a colleague of his.

Penny's criticism of Wolowitz's romantic life pushes him into depression and AWOL for a fighting robot battle the guys are depending on him for.

Looking to get friendly with Barry Kripke to gain access to a piece of high-tech lab equipment, Sheldon develops a flowchart process to make friends.

When Sheldon loans money to Penny so she can pay her rent, it leads to Leonard coming face-to-face with her ex, Kurt.

A visit from Leonard's mother ends up bringing him and Penny closer.

Paintball leads to a squabble between Sheldon and Penny as well as romance between Howard and Leslie.

The gang is thrilled to see Summer Glau is also aboard their train to San Francisco. Sheldon frets over having forgotten a paper he wants to present.

Penny's business selling hair accessories out of her apartment gets out of hand when an over-caffeinated Sheldon takes charge.

Penny feels threatened when another sexy woman moves into the apartment building and angered when she senses the guys are being taken advantage of.

A fellow comic book enthusiast's hitting on Penny leads to Leonard, Raj and Howard going to a bar's Ladies' Night.

Leonard and Raj take Wolowitz to Las Vegas to help him get over his break-up. Sheldon locks himself out and has only one other place to stay: Penny's.

Stuart asks Leonard's advice for a date with Penny. Wolowitz realises there's an error in a toilet he designed for the International Space Station.

The guys receive a prestigious offer to work over the summer at the North Pole, and Penny's resultant behaviour leaves Leonard unsure if he should go.

Discovering Leonard, Raj and Howard fudged the results of his Arctic research expedition, a disgraced Sheldon heads home to Texas.

Sheldon and Howard wager comic books over a cricket's species. Meanwhile, a less-than-perfect romantic night agonizes Leonard and Penny.

Howard takes Raj along to check out the Goth dating scene. Sheldon uses chocolate as part of a behaviour modification experiment on Penny.

Facing a return to India, Raj needs a job desperately enough to consider working for Sheldon. Howard becomes a third wheel to Leonard and Penny.

Sheldon looks forward to squaring off against a Star Trek actor in a fantasy card game tournament. Wolowitz cashes in on an old pact with Leonard.

Georgie helps Connor impress his new crush, while Mandy, Audrey and Jim struggle to butt out of Connor's love life.

Baby Fight! Georgie and Mandy worry they're not on the same page when they disagree about having another kid, and Mary, Jim and Audrey struggle to stay out of it.

Dara Ó Briain hosts more laughter filled game play with guests Rhys James, Angela Barnes, Sarah Keyworth, Glenn Moore, Milton Jones and Ahir Shah.

Dara Ó Briain introduces topical chat and laugh out loud games with guests Rhys James, Ed Byrne, Glenn Moore, Sara Pascoe and Emmanuel Sonubi.

Guz transforms his S2000 with new lights and under glow, jumps into a turbo Micra thrill ride, and explores bold builds from across the modding world.