The Big Bang Theory - Season 5

The Big Bang Theory - Season 5

Season 5

Penny regrets her sleeping with Raj and has become very good friends with Leonard, Leonard breaks up with Priya, Amy pushes Sheldon in their relationship eventually becoming boyfriend and girlfriend, Penny and the other women become a clique of their own, Howard prepares for his wedding and going into space to the International Space Station and Leonard asks Penny out as they begin "Leonard and Penny 2.0".

Network
Episodes24
DatesSep 22, 2011 - May 10, 2012
Previous SeasonNext Season

Episodes

The Skank Reflex Analysis
Season 5Episode 130 min

The Skank Reflex Analysis

Penny worries that she's screwed things up permanently with her friends, while Sheldon takes command of the paintball team.

Sep 22, 2011
The Infestation Hypothesis
Season 5Episode 230 min

The Infestation Hypothesis

Fight between Sheldon and Penny leaves Amy caught in the middle, while Leonard tries to spice up his long-distance relationship with Priya.

Sep 22, 2011
The Pulled Groin Extrapolation
Season 5Episode 330 min

The Pulled Groin Extrapolation

Leonard and Amy get to know each other better, while Howard and Bernadette spend the weekend with Mrs. Wolowitz.

Sep 29, 2011
The Wiggly Finger Catalyst
Season 5Episode 430 min

The Wiggly Finger Catalyst

Raj finally meets a girl he can communicate with.

Oct 6, 2011
The Russian Rocket Reaction
Season 5Episode 530 min

The Russian Rocket Reaction

Sheldon and Leonard get invited to a party at Wil Wheaton's house, and Howard gets an out-of-this-world opportunity.

Oct 13, 2011
The Rhinitis Revelation
Season 5Episode 630 min

The Rhinitis Revelation

Sheldon competes with the gang for his mother's attention when she comes to visit.

Oct 20, 2011
The Good Guy Fluctuation
Season 5Episode 730 min

The Good Guy Fluctuation

Cute comic book artist puts Leonard and Priya's relationship to the test, while Sheldon tries to scare the guys for Halloween.

Oct 27, 2011
The Isolation Permutation
Season 5Episode 830 min

The Isolation Permutation

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

Nov 3, 2011
The Ornithophobia Diffusion
Season 5Episode 930 min

The Ornithophobia Diffusion

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

Nov 10, 2011
The Flaming Spittoon Acquisition
Season 5Episode 1030 min

The Flaming Spittoon Acquisition

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

Nov 17, 2011
The Speckerman Recurrence
Season 5Episode 1130 min

The Speckerman Recurrence

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

Dec 8, 2011
The Shiny Trinket Maneuver
Season 5Episode 1230 min

The Shiny Trinket Maneuver

Sheldon gets in trouble with Amy when he isn't impressed by her recent accomplishment, and Howard must come to grips with Bernadette's dislike of children.

Jan 12, 2012
The Recombination Hypothesis
Season 5Episode 1330 min

The Recombination Hypothesis

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

Jan 19, 2012
The Beta Test Initiation
Season 5Episode 1430 min

The Beta Test Initiation

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

Jan 26, 2012
The Friendship Contraction
Season 5Episode 1530 min

The Friendship Contraction

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

Feb 2, 2012
The Vacation Solution
Season 5Episode 1630 min

The Vacation Solution

When Sheldon is forced to take his vacation, he goes to work with Amy in her neurobiology lab. Meanwhile, Bernadette wants Howard to sign a pre-nup.

Feb 9, 2012
The Rothman Disintegration
Season 5Episode 1730 min

The Rothman Disintegration

When an office at the University opens up, Sheldon must compete for it with his archenemy, Kripke. Meanwhile, a gift from Amy makes Penny uncomfortable.

Feb 16, 2012
The Werewolf Transformation
Season 5Episode 1830 min

The Werewolf Transformation

Sheldon's life is turned upside-down after his barber gets sick. Meanwhile, astronaut training causes Wolowitz to rethink his decision to go into space.

Feb 23, 2012
The Weekend Vortex
Season 5Episode 1930 min

The Weekend Vortex

Sheldon chooses to play video games with the guys rather than go with Amy to her aunt's birthday party.

Mar 8, 2012
The Transporter Malfunction
Season 5Episode 2030 min

The Transporter Malfunction

Penny buys Leonard and Sheldon "Star Trek" collectibles as a thank-you, leading Sheldon to be haunted by Mr. Spock. Meanwhile, Raj decides he has met the "Future Mrs. Koothrappali" after his parents set him up on a date.

Mar 29, 2012
The Hawking Excitation
Season 5Episode 2130 min

The Hawking Excitation

When Wolowitz gets to work with Stephen Hawking, Sheldon is willing to do anything to meet his hero.

Apr 5, 2012
The Stag Convergence
Season 5Episode 2230 min

The Stag Convergence

Bernadette reconsiders marrying Howard after learning about his sexual history.

Apr 26, 2012
The Launch Acceleration
Season 5Episode 2330 min

The Launch Acceleration

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

May 3, 2012
The Countdown Reflection
Season 5Episode 2430 min

The Countdown Reflection

When Howard and Bernadette decide they want to be married before his NASA launch, the gang rushes to put on a wedding.

May 10, 2012

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