The Big Bang Theory (2007)

The Big Bang Theory is centered on five characters living in Pasadena, California: roommates Leonard Hofstadter and Sheldon Cooper; Penny, a waitress and aspiring actress who lives across the hall; and Leonard and Sheldon's equally geeky and socially awkward friends and co-workers, mechanical engineer Howard Wolowitz and astrophysicist Raj Koothrappali. The geekiness and intellect of the four guys is contrasted for comic effect with Penny's social skills and common sense.

  • Chuck Lorre
  • Bill Prady
  • Adam Faberman

Release Date: 2007-09-24
Seasons: 1 2 3 4 5 6 7 8 9 10 11 12
metacritic icon 8.0/10
themoviedb icon 6.8/10
  • Country: US
  • Language: En
  • Runtime: 22
Season 4 Episode List
  • The Robotic Manipulation

    Episode 1 - The Robotic Manipulation

    Release Date: 2010-09-23

    Penny tags along on Sheldon's first ever date; Wolowitz finds a new use for a robotic arm.

  • The Cruciferous Vegetable Amplification

    Episode 2 - The Cruciferous Vegetable Amplification

    Release Date: 2010-09-30

    Realizing he will not live long enough to download his consciousness into a robot body, Sheldon tries to extend his life span.

  • The Zazzy Substitution

    Episode 3 - The Zazzy Substitution

    Release Date: 2010-10-07

    The guys are concerned as Sheldon searches for an alternative to human companionship.

  • The Hot Troll Deviation

    Episode 4 - The Hot Troll Deviation

    Release Date: 2010-10-14

    An embarrassing secret of Wolowitz's comes to light, while Sheldon and Raj have a small war at work.

  • The Desperation Emanation

    Episode 5 - The Desperation Emanation

    Release Date: 2010-10-21

    Leonard realizes he’s the only one without a girlfriend, while Sheldon wants to get rid of his.

  • The Irish Pub Formulation

    Episode 6 - The Irish Pub Formulation

    Release Date: 2010-10-28

    Leonard keeps an affair a secret from Sheldon, Howard and Raj.

  • The Apology Insufficiency

    Episode 7 - The Apology Insufficiency

    Release Date: 2010-11-04

    Sheldon's answers during an FBI interview put Wolowitz's security clearance in jeopardy.

  • The 21-second Excitation

    Episode 8 - The 21-second Excitation

    Release Date: 2010-11-11

    While the guys camp in line for a long-awaited movie screening, Penny and Bernadette invite Amy to her first slumber party.

  • The Boyfriend Complexity

    Episode 9 - The Boyfriend Complexity

    Release Date: 2010-11-18

    Penny asks Leonard to lie to her father, while Howard, Raj and Bernadette pull an all-nighter at a telescope.

  • The Alien Parasite Hypothesis

    Episode 10 - The Alien Parasite Hypothesis

    Release Date: 2010-12-09

    Amy finds she has sexual feelings for Penny's ex, while Koothrappali and Wolowitz try to prove who would be the better superhero.

  • The Justice League Recombination

    Episode 11 - The Justice League Recombination

    Release Date: 2010-12-16

    The guys find a "super" use for Penny's new boyfriend, Zack, when they enter a costume contest as the Justice League.

  • The Bus Pants Utilization

    Episode 12 - The Bus Pants Utilization

    Release Date: 2011-01-06

    Leonard's idea for a smartphone app derails his friendship with Sheldon.

  • The Love Car Displacement

    Episode 13 - The Love Car Displacement

    Release Date: 2011-01-20

    Bernadette runs into her ex-boyfriend while attending a science event with Wolowitz.

  • The Thespian Catalyst

    Episode 14 - The Thespian Catalyst

    Release Date: 2011-02-03

    Hoping it will make him a better teacher, Sheldon has Penny give him acting lessons. Raj has fantasies about a friend's girlfriend.

  • The Benefactor Factor

    Episode 15 - The Benefactor Factor

    Release Date: 2011-02-10

    A wealthy donor to the university makes Leonard consider how far he's willing to go for the sake of science.

  • The Cohabitation Formulation

    Episode 16 - The Cohabitation Formulation

    Release Date: 2011-02-17

    As Wolowitz contemplates taking things with Bernadette to the next level, Leonard rekindles his relationship with Raj's sister.

  • The Toast Derivation

    Episode 17 - The Toast Derivation

    Release Date: 2011-02-24

    Sheldon becomes concerned when everybody begins to hang out at Raj's apartment and discovers Leonard is the center of the group.

  • The Prestidigitation Approximation

    Episode 18 - The Prestidigitation Approximation

    Release Date: 2011-03-10

    Sheldon is baffled by Wolowitz's magic trick. Meanwhile, Leonard realizes dating Priya may make it impossible to continue being friends with Penny.

  • The Zarnecki Incursion

    Episode 19 - The Zarnecki Incursion

    Release Date: 2011-03-31

    Sheldon's online-game account is hacked by Todd Zarnecki, who then proceeds to steal all his items prompting the guys to go on a quest to retrieve them. Penny, Bernadette and Amy discuss how Penny groomed Leonard to be willing to try various things and more adventurous boyfriend... for some other woman — Priya.

  • The Herb Garden Germination

    Episode 20 - The Herb Garden Germination

    Release Date: 2011-04-07

    Sheldon and Amy decide to start several rumors about the others as a test. Meanwhile, Howard takes his relationship with Bernadette to even higher level.

  • The Agreement Dissection

    Episode 21 - The Agreement Dissection

    Release Date: 2011-04-28

    When Leonard spends too much time in the shower with Priya, Sheldon charges Leonard with two violations of the roommate agreement. However, before he can get too far, Priya uses her skills as a lawyer to nullify the charges due to the agreement's vague wording, much to Sheldon's dismay. When the guys take advantage of Priya's skills in order to eat Greek food on pizza night, Sheldon goes to Penny, who invites him to a girls' night out with Amy and Bernadette, which Sheldon agrees to after Penny mentions that they may be talking trash about Priya. After the girls drink some cocktails, they decide to take Sheldon dancing, which Sheldon reluctantly goes along with. After dancing, Sheldon takes an intoxicated Amy back to her apartment and as well as talking about Priya, meets a monkey who is addicted to smoking cigarettes. Amy tells Sheldon not to give in to Priya's law skills, before kissing him and going to her bathroom to vomit.

  • The Wildebeest Implementation

    Episode 22 - The Wildebeest Implementation

    Release Date: 2011-05-05

    Raj attempts to cure his social anxiety disorder while Penny uses Bernadette to spy on Leonard and his girlfriend.

  • The Engagement Reaction

    Episode 23 - The Engagement Reaction

    Release Date: 2011-05-12

    When Howard finally breaks the news to his mom that he's engaged to Bernadette, it lands her in the hospital.

  • The Roommate Transmogrification

    Episode 24 - The Roommate Transmogrification

    Release Date: 2011-05-19

    When Bernadette receives her PhD, Wolowitz feels emasculated. Raj and Leonard swap places and Penny does something she's regrets.

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