The Big Bang Theory - Season 5

Description: In season five, Penny and Leonard's relationship is relaunched in full "beta test" mode, while Sheldon, Howard, and Raj discover the feminine mystique is something that cannot be easily graphed or calculated. As Sheldon makes begrudging amendments to his "Relationship Agreement" with his "friend-who-happens-to-be-a-girl" Amy Farrah Fowler, Raj contemplates an arranged marriage, and Howard is all-systems-go for both is NASA space launch and wedding to the spirited Bernadette.

Episodes

Ep 1
The Skank Reflex Analysis

The Skank Reflex Analysis

Aired: Sep 22, 2011

Penny is worried with how damaged her friendship with the guys will be in the af...

Ep 2
The Infestation Hypothesis

The Infestation Hypothesis

Aired: Sep 22, 2011

A fight between Sheldon and Penny leaves Amy caught in the middle, while Leonard...

Ep 3
The Pulled Groin Extrapolation

The Pulled Groin Extrapolation

Aired: Sep 29, 2011

Leonard and Amy get to know each other better, while Howard and Bernadette spend...

Ep 4
The Wiggly Finger Catalyst

The Wiggly Finger Catalyst

Aired: Oct 6, 2011

Penny plays Matchmaker for Raj, which results in him finding a girl he is comfor...

Ep 5
The Russian Rocket Reaction

The Russian Rocket Reaction

Aired: Oct 13, 2011

Sheldon and Leonard get invited to a party at Wil Wheaton's house, and Howard ge...

Ep 6
The Rhinitis Revelation

The Rhinitis Revelation

Aired: Oct 20, 2011

Sheldon's mother, Mary Cooper, comes to visit, but Sheldon is annoyed that she a...

Ep 7
The Good Guy Fluctuation

The Good Guy Fluctuation

Aired: Oct 27, 2011

A cute comic book artist puts Leonard and Priya’s relationship to the test, wh...

Ep 8
The Isolation Permutation

The Isolation Permutation

Aired: Nov 3, 2011

Amy becomes heartbroken when she discovers that Penny and Bernadette went weddin...

Ep 9
The Ornithophobia Diffusion

The Ornithophobia Diffusion

Aired: Nov 10, 2011

Leonard and Penny try hanging out as friends on a 'non-date', but end up purpose...

Ep 10
The Flaming Spittoon Acquisition

The Flaming Spittoon Acquisition

Aired: Nov 17, 2011

When Stuart asks Amy out on a date, Sheldon must confront his feelings and consi...

Ep 11
The Speckerman Recurrence

The Speckerman Recurrence

Aired: Dec 8, 2011

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

Ep 12
The Shiny Trinket Maneuver

The Shiny Trinket Maneuver

Aired: Jan 12, 2012

Sheldon gets in trouble with Amy when he isn't impressed by her recent accomplis...

Ep 13
The Recombination Hypothesis

The Recombination Hypothesis

Aired: Jan 19, 2012

Leonard, who broke up with Priya, asks Penny out to a spur-of the-moment romanti...

Ep 14
The Beta Test Initiation

The Beta Test Initiation

Aired: Jan 26, 2012

Leonard and Penny deal with the idea of starting a relationship again and Raj fi...

Ep 15
The Friendship Contraction

The Friendship Contraction

Aired: Feb 2, 2012

Sheldon's selfish demands force Leonard to reconsider their friendship. Meanwhil...

Ep 16
The Vacation Solution

The Vacation Solution

Aired: Feb 9, 2012

When Sheldon is forced to take his vacation, he goes to work with Amy in her neu...

Ep 17
The Rothman Disintegration

The Rothman Disintegration

Aired: Feb 16, 2012

Sheldon battles Kripke for a coveted office at the university. Penny receives a ...

Ep 18
The Werewolf Transformation

The Werewolf Transformation

Aired: Feb 23, 2012

Sheldon becomes agitated when his regular barber is out sick. Astronaut training...

Ep 19
The Weekend Vortex

The Weekend Vortex

Aired: Mar 8, 2012

Sheldon must choose between joining Amy at her aunt's birthday party or playing ...

Ep 20
The Transporter Malfunction

The Transporter Malfunction

Aired: Mar 29, 2012

Penny buys Leonard and Sheldon “Star Trek” collectibles as a thank-you, lead...

Ep 21
The Hawking Excitation

The Hawking Excitation

Aired: Apr 5, 2012

When Wolowitz gets to work with Stephen Hawking, Sheldon is willing to do anythi...

Ep 22
The Stag Convergence

The Stag Convergence

Aired: Apr 26, 2012

After the guys throw Howard a bachelor party, Bernadette reconsiders marrying hi...

Ep 23
The Launch Acceleration

The Launch Acceleration

Aired: May 3, 2012

When NASA moves up Howard's mission, he must face his fears and Bernadette's dad...

Ep 24
The Countdown Reflection

The Countdown Reflection

Aired: May 10, 2012

The fifth season ends with Howard and Bernadette deciding to get married before ...