Episode Guide

The Werewolf Transformation

The Werewolf Transformation

Season 5, Ep. 18

After his barber is hospitalized, Sheldon undergoes a hair-raising change in lifestyle as his carefully planned daily routines are thrown for a loop. Meanwhile, Howard is up in the air about continuing his astronaut training.

Original Air Date: February 23, 2012

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The Rothman Disintegration

The Rothman Disintegration

Season 5, Ep. 17

Sheldon and Kripke square off in a series of sports-related competitions to win a coveted corner office at the university. Meanwhile, Penny feels uncomfortable accepting a gift from Amy.

Original Air Date: February 16, 2012

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The Friendship Contraction

The Friendship Contraction

Season 5, Ep. 15

Sheldon's selfish demands force Leonard to reconsider their friendship. Meanwhile, Wolowitz tries to pick his astronaut nickname.

Original Air  Date: February 2, 2012

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The Beta Test Initiation

The Beta Test Initiation

Season 5, Ep. 14

Leonard and Penny experiment with dating, while Raj develops a peculiar relationship with his phone's virtual assistant.

Original Air Date: January 26, 2012

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The Recombination Hypothesis

The Recombination Hypothesis

Season 5, Ep. 13

Everything might change when Leonard offers Penny a spur of the moment invitation to a romantic dinner for two.

Original Air Date: January 19, 2012

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The Shiny Trinket Manoeuvre

The Shiny Trinket Manoeuvre

Season 5, Ep. 12

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The Speckerman Recurrence

The Speckerman Recurrence

Season 5, Ep. 11

Leonard must face his fears after being contacted by his high school tormentor.

Original Air Date: December 8, 2011

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The Flaming Spittoon Acquisition

The Flaming Spittoon Acquisition

Season 5, Ep. 10

Sheldon considers taking his relationship with Amy to the next level when Stuart from the comic book store asks her out on a date.

Original Air Date: November 17, 2011

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The Ornithophibia Diffusion

The Ornithophibia Diffusion

Season 5, Ep. 9

Leonard and Penny try hanging out alone, and Sheldon must overcome his fear of birds.

Original Air Date: November 10, 2011

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The Isolation Permutation

The Isolation Permutation

Season 5, Ep. 8

Amy is crushed when Bernadette and Penny go shopping for wedding dresses without her.

Original Air Date: November 3, 2011

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Good Guy Fluctuation

Good Guy Fluctuation

Season 5, Ep. 7

An attractive comic book artist tests Leonard and Priya's relationship; Sheldon tries to scare his friends.

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The Rhinitis Revelation

The Rhinitis Revelation

Season 5, Ep. 6

Sheldon finds himself competing with the gang for his mother's attention when she visits.

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The Wiggly Finger Catalyst

The Wiggly Finger Catalyst

Season 5, Ep. 4

Raj meets a woman with whom he's able to talk.

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The Pulled Groin Extrapolation

The Pulled Groin Extrapolation

Season 5, Ep. 3

Amy and Leonard try to become better acquainted; Bernadette, Howard and Mrs. Wolowitz spend the weekend together.

The Skank Reflex Analysis *Premiere*

The Skank Reflex Analysis *Premiere*

Season 5, Ep. 1

Penny hits a low point when she realizes what she's done by sleeping with Raj; Sheldon becomes the leader of the paintball team.

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The Roommate Transmogrification

The Roommate Transmogrification

Season 4, Ep. 24

Hearing Star Trek sex games between Leonard and Priya sends Raj to live with Sheldon. Bernadette's earning her Ph.D makes the guys mock Wolowitz for not having one even more.

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The Engagement Reaction

The Engagement Reaction

Season 4, Ep. 23

Mrs. Wolowitz ends up in the hospital after Howard tells her he's marrying Bernadette. While there, Leonard stresses over Penny and Priya warming up to one another.

The Wildebeest Implementation

The Wildebeest Implementation

Season 4, Ep. 22

Amy recognizes a dinner invitation to be a chance for Bernadette to spy on Leonard and Priya for Penny. Meanwhile, a lonely Raj considers taking experimental medication to cure himself of his inability to talk to women while sober, and Sheldon devises three-person chess.

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The Agreement Dissection

The Agreement Dissection

Season 4, Ep. 21

Miffed over Priya breaking down the Roommate Agreement using legal theory, Sheldon joins Penny, Bernadette, and Amy on their girls' night.

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The Herb Garden Germination

The Herb Garden Germination

Season 4, Ep. 20

Sheldon and Amy decide to start rumors about themselves as a social test. Meanwhile, Howard takes his relationship with Bernadette to an even higher level.

The Zarnecki Incursion

The Zarnecki Incursion

Season 4, Ep. 19

When Sheldon has his World of Warcraft account hacked and his character stolen from, the guys team up to discover out who did it. Meanwhile, Bernadette and Amy try to help Penny deal with Leonard's continuing relationship with Priya.

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The Prestidigitation Approximation

The Prestidigitation Approximation

Season 4, Ep. 18

Sheldon is baffled by Wolowitz's magic trick. Meanwhile, Priya disapproves of Leonard continuing to be friends with Penny.

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The Toast Derivation

The Toast Derivation

Season 4, Ep. 17

Told Leonard is the center of the gang and miffed that they've started hanging out at Raj's, Sheldon seeks to form a new group of friends of which he can be the center.

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The Cohabitation Formulation

The Cohabitation Formulation

Season 4, Ep. 16

Bernadette tells Howard that it's time to choose between moving in with her or staying with his mother. Leonard discovers Raj's sister Priya is back in town and reconnects with her, and Amy tries to comfort Penny when she finds out.

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The Benefactor Factor

The Benefactor Factor

Season 3, Ep. 15

After meeting at a fundraising gala, an aged, but wealthy, Caltech donor makes Leonard ponder if he's willing to have sex with her to secure another donation.

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