Last episode
The Stockholm Syndrome
s12e24 · 2019-05-17
Ended · US
The Big Bang Theory
CBS Scripted
What it is
The Big Bang Theory is a comedy about brilliant physicists, Leonard and Sheldon, who are the kind of "beautiful minds" that understand how the universe works. But none of that genius helps them interact with people, especially women. All this begins to change when a free-spirited beauty named Penny moves in next door. Sheldon, Leonard's roommate, is quite content spending his nights playing Klingon Boggle with their socially dysfunctional friends, fellow Cal Tech scientists Wolowitz and Koothrappali. However, Leonard sees in Penny a whole new universe of possibilities... including love.
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Episode guide
24 this season · 279 totals05e01 The Skank Reflex Analysis 2011-09-23 00:00
The Skank Reflex Analysis
Penny worries that she's screwed things up permanently with her friends, while Sheldon takes command of the paintball team.
s05e02 The Infestation Hypothesis 2011-09-23 00:30
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.
s05e03 The Pulled Groin Extrapolation 2011-09-30 00:00
The Pulled Groin Extrapolation
Leonard and Amy get to know each other better, while Howard and Bernadette spend the weekend with Mrs. Wolowitz.
s05e04 The Wiggly Finger Catalyst 2011-10-07 00:00
The Wiggly Finger Catalyst
Raj finally meets a girl he can communicate with.
s05e05 The Russian Rocket Reaction 2011-10-14 00:00
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.
s05e06 The Rhinitis Revelation 2011-10-21 00:00
The Rhinitis Revelation
Sheldon competes with the gang for his mother's attention when she comes to visit.
s05e07 The Good Guy Fluctuation 2011-10-28 00:00
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.
s05e08 The Isolation Permutation 2011-11-04 00:00
The Isolation Permutation
Amy is crushed when Bernadette and Penny go shopping for wedding dresses without her.
s05e09 The Ornithophobia Diffusion 2011-11-11 01:00
The Ornithophobia Diffusion
Leonard and Penny try hanging out alone, and Sheldon must overcome his fear of birds.
s05e10 The Flaming Spittoon Acquisition 2011-11-18 01:00
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.
s05e11 The Speckerman Recurrence 2011-12-09 01:00
The Speckerman Recurrence
Leonard must face his fears after being contacted by his high school tormentor.
s05e12 The Shiny Trinket Maneuver 2012-01-13 01:00
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.
s05e13 The Recombination Hypothesis 2012-01-20 01:00
The Recombination Hypothesis
Everything might change when Leonard offers Penny a spur of the moment invitation to a romantic dinner for two.
s05e14 The Beta Test Initiation 2012-01-27 01:00
The Beta Test Initiation
Leonard and Penny experiment with dating, while Raj develops a peculiar relationship with his phone's virtual assistant.
s05e15 The Friendship Contraction 2012-02-03 01:00
The Friendship Contraction
Sheldon's selfish demands force Leonard to reconsider their friendship. Meanwhile, Wolowitz tries to pick his astronaut nickname.
s05e16 The Vacation Solution 2012-02-10 01:00
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.
s05e17 The Rothman Disintegration 2012-02-17 01:00
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.
s05e18 The Werewolf Transformation 2012-02-24 01:00
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.
s05e19 The Weekend Vortex 2012-03-09 01:00
The Weekend Vortex
Sheldon chooses to play video games with the guys rather than go with Amy to her aunt's birthday party.
s05e20 The Transporter Malfunction 2012-03-30 00:00
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.
s05e21 The Hawking Excitation 2012-04-06 00:00
The Hawking Excitation
When Wolowitz gets to work with Stephen Hawking, Sheldon is willing to do anything to meet his hero.
s05e22 The Stag Convergence 2012-04-27 00:00
The Stag Convergence
Bernadette reconsiders marrying Howard after learning about his sexual history.
s05e23 The Launch Acceleration 2012-05-04 00:00
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.
s05e24 The Countdown Reflection 2012-05-11 00:00
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.