The Big Bang Theory

  • Score 8.8
  • Premiered: Sep 2007
  • Episodes: 267
  • Followers: 54,9k
  • Rank #2
  • Running
  • CBS
  • Monday at 8

Seasons:

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Season 4 Discuss
4x1
The Robotic Manipulation
Air date
Sep 23, 2010
Penny tags along on Sheldon's first ever date; Wolowitz finds a new use for a robotic arm.
4x2
The Cruciferous Vegetable Amplification
Air date
Sep 30, 2010
Realizing he will not live long enough to download his consciousness into a robot body, Sheldon tries to extend his life span.
4x3
The Zazzy Substitution
Air date
Oct 07, 2010
The guys are concerned as Sheldon searches for an alternative to human companionship.
4x4
The Hot Troll Deviation
Air date
Oct 14, 2010
An embarrassing secret of Wolowitz's comes to light, while Sheldon and Raj have a small war at work.
4x5
The Desperation Emanation
Air date
Oct 21, 2010
Leonard realizes he’s the only one without a girlfriend, while Sheldon wants to get rid of his.
4x6
The Irish Pub Formulation
Air date
Oct 28, 2010
Leonard keeps an affair a secret from Sheldon, Howard and Raj.
4x7
The Apology Insufficiency
Air date
Nov 04, 2010
Sheldon's answers during an FBI interview put Wolowitz's security clearance in jeopardy.
4x8
The 21-Second Excitation
Air date
Nov 11, 2010
While the guys camp in line for a long-awaited movie screening, Penny and Bernadette invite Amy to her first slumber party.
4x9
The Boyfriend Complexity
Air date
Nov 18, 2010
Penny asks Leonard to lie to her father, while Howard, Raj and Bernadette pull an all-nighter at a telescope.
4x10
The Alien Parasite Hypothesis
Air date
Dec 09, 2010
Amy finds she has sexual feelings for Penny's ex, while Koothrappali and Wolowitz try to prove who would be the better superhero.
4x11
The Justice League Recombination
Air date
Dec 16, 2010
The guys find a "super" use for Penny's new boyfriend, Zack, when they enter a costume contest as the Justice League.
4x12
The Bus Pants Utilization
Air date
Jan 06, 2011
Leonard's idea for a smartphone app derails his friendship with Sheldon.
4x13
The Love Car Displacement
Air date
Jan 20, 2011
Bernadette runs into her ex-boyfriend while attending a science event with Wolowitz.
4x14
The Thespian Catalyst
Air date
Feb 03, 2011
Hoping it will make him a better teacher, Sheldon has Penny give him acting lessons. Raj has fantasies about a friend's girlfriend.
4x15
The Benefactor Factor
Air date
Feb 10, 2011
A wealthy donor to the university makes Leonard consider how far he's willing to go for the sake of science.
4x16
The Cohabitation Formulation
Air date
Feb 17, 2011
As Wolowitz contemplates taking things with Bernadette to the next level, Leonard rekindles his relationship with Raj's sister.
4x17
The Toast Derivation
Air date
Feb 24, 2011
Sheldon becomes concerned when everybody begins to hang out at Raj's apartment and discovers Leonard is the center of the group.
4x18
The Prestidigitation Approximation
Air date
Mar 10, 2011
Sheldon is baffled by Wolowitz's magic trick. Meanwhile, Leonard realizes dating Priya may make it impossible to continue being friends with Penny.
4x19
The Zarnecki Incursion
Air date
Mar 31, 2011
Sheldon's World of Warcraft online game account is hacked and he is determined to find out who did it. Also Penny shares some girl talk with her friends about Leonard and his new .. show full overview
4x20
The Herb Garden Germination
Air date
Apr 07, 2011
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.
4x21
The Agreement Dissection
Air date
Apr 28, 2011
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 .. show full overview
4x22
The Wildebeest Implementation
Air date
May 05, 2011
Raj attempts to cure his social anxiety disorder while Penny uses Bernadette to spy on Leonard and his girlfriend.
4x23
The Engagement Reaction
Air date
May 12, 2011
When Howard finally breaks the news to his mom that he's engaged to Bernadette, it lands her in the hospital.
4x24 Season finale
The Roommate Transmogrification
Air date
May 19, 2011
When Bernadette receives her PhD, Wolowitz feels emasculated. Raj and Leonard swap places and Penny does something she's regrets.

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