Episode Guide

The Date Night Variable

The Date Night Variable

Season 6, Ep. 1

Raj faces his loneliness when his friends are out on dates; while in space, Wolowitz gets drawn into a fight between Bernadette and his mom.

First aired on Sept. 27.

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The Countdown Reflection

The Countdown Reflection

Season 5, Ep. 24

In the season finale, Howard and Bernadette decide to get married before his NASA mission, causing the gang to scurry into overdrive in an effort to stage the wedding.

Original Air Date: May 10, 2012

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The Launch Acceleration

The Launch Acceleration

Season 5, Ep. 23

NASA reschedules Howard's mission, putting the wedding plans in jeopardy. Meanwhile, Leonard says something surprising to Penny in the bedroom.

Original Air Date: May 3, 2012

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The Stag Convergence

The Stag Convergence

Season 5, Ep. 22

Bernadette has second thoughts about marrying Howard when details of his sexual history emerge at his bachelor party.

Original Air Date: April 26, 2012

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The Hawking Excitation

The Hawking Excitation

Season 5, Ep. 21

Sheldon is in seventh heaven and prepared to do whatever it takes to meet his science idol Stephen Hawking, who is working on a project with Wolowitz.

Original Air Date: April 5, 2012

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The Transporter Malfunction

The Transporter Malfunction

Season 5, Ep. 20

Raj may have found his soul mate after his parents set him up on a date. Meanwhile, Sheldon thinks he's going out of his mind when he begins hearing the voice of Spock (Leonard Nimoy) after he breaks Leonard's "Star Trek" collectible.

Original Air Date: March 29, 2012

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The Weekend Vortex

The Weekend Vortex

Season 5, Ep. 19

Sheldon opts to spend a weekend playing video games with the guys instead of attending a birthday party for Amy's aunt.

Original Air Date: March 8, 2012

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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