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When Molly gets angry with Mike for not listening to her vent about writing with Peggy, they go their separate ways for a day.

After Carl has a near-death experience while on duty, he tells Mike he's going to propose to Victoria. But can Mike keep a secret.

The Bitter Man And The Sea. Mike and Molly are forced to 'uninvite' Carl to their anniversary cruise following his nasty breakup with Victoria.

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.

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

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.

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.

Mike and Carl decide to go to couples counselling to try and reconcile their partnership. Plus, Molly decides to do a promotional radio interview.

Molly has high hopes that a fitness tracking device will encourage Mike to be more active. But Mike has other plans for it.

After Peg suffers a heart attack after a heated argument with Molly, Mike blames his wife, who immediately sets out to make amends.

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.

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.

Pedro tells Liz he worries Sophie isn't ready for a relationship. Cortney and Colt still have intimacy issues, as she wonders about his intentions.

Why I Want To Be A Monogamist. Christine and David visit Janelle. Kody and Robyn discuss their now monogamist relationship and the possibility of bringing in a new wife.

To Get A Diagnosis Is Everything. Ryan has excruciating sores in his groin and a cyst on his neck. Dr Emma delivers a diagnosis, but he must give up smoking to finally recover.

Jess is looking for love but has a giant bump on his neck. Former NFL defensive tackle, Marcell Dareus, hopes Dr. Lee can tackle his forehead lipoma.

Brent has a tricep bump that could be intertwined in his muscle. Plus, Jeb avoids the beach because of the massive number of bumps all over his body.

At just 24, Bettie Jo is eating her way towards 700-lbs. Housebound, she is reliant on her husband for even basic needs. But can she shed the pounds.

Joe is only 30, and trapped in an 800-lb body. He lost his job and is mostly housebound. Can Joe find the strength to face his past and save his life.

ICU nurse Isabella is hoping her final look will come together just days before her wedding. Plus, LaQuesha is determined to find two blingy dresses.

Christie loves plunging necklines, but her mum doesn't want anything too revealing. Monique is so picky that she has Mindy and Randy both stumped.

Mike and Carl decide to go to couples counselling to try and reconcile their partnership. Plus, Molly decides to do a promotional radio interview.

Molly has high hopes that a fitness tracking device will encourage Mike to be more active. But Mike has other plans for it.

After Peg suffers a heart attack after a heated argument with Molly, Mike blames his wife, who immediately sets out to make amends.

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.

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.

Mike becomes hyper-vigilant after his wallet is stolen from the squad car while taking a nap.

Molly is shocked when Joyce reveals she's leaving the house to Victoria in her will.

Molly's leisure activities between novels become an issue for Mike. Tensions rise as he wants her to be the perfect homemaker.

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.

When Mary takes a job at the church, Sheldon and Missy are left home alone for the very first time.

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.