The Big Bang Theory: Season 4

Episodes

# Air Date Title
0 Sep 22
2010

Craig Ferguson Hosts The Cast Of Big Bang Theory

Tonight, it’s a special Big Bang Theory edition of The Late Late Show with Craig Ferguson. The cast will pretty much take over the show, including comedy sketches. Meanwhile, C…

1 Sep 23
2010

The Robotic Manipulation

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

2 Sep 30
2010

The Cruciferous Vegetable Amplification

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

3 Oct 07
2010

The Zazzy Substitution

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

4 Oct 14
2010

The Hot Troll Deviation

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

5 Oct 21
2010

The Desperation Emanation

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

6 Oct 28
2010

The Irish Pub Formulation

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

7 Nov 04
2010

The Apology Insufficiency

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

8 Nov 11
2010

The 21-Second Excitation

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

9 Nov 18
2010

The Boyfriend Complexity

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

10 Dec 09
2010

The Alien Parasite Hypothesis

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

11 Dec 16
2010

The Justice League Recombination

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

12 Jan 06
2011

The Bus Pants Utilization

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

13 Jan 20
2011

The Love Car Displacement

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

14 Feb 03
2011

The Thespian Catalyst

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

15 Feb 10
2011

The Benefactor Factor

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

16 Feb 17
2011

The Cohabitation Formulation

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

17 Feb 24
2011

The Toast Derivation

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

18 Mar 10
2011

The Prestidigitation Approximation

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

19 Mar 31
2011

The Zarnecki Incursion

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…

20 Apr 07
2011

The Herb Garden Germination

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.

21 Apr 28
2011

The Agreement Dissection

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 use…

22 May 05
2011

The Wildebeest Implementation

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

23 May 12
2011

The Engagement Reaction

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

24 May 19
2011

The Roommate Transmogrification

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

About The Big Bang Theory

What happens when hyperintelligent roommates Sheldon and Leonard meet Penny, a free-spirited beauty moving in next door, and realize they know next to nothing about life outside of the lab. Rounding out the crew are the smarmy Wolowitz, who thinks he’s as sexy as he is brainy, and Koothrappali, who suffers from an inability to speak in the presence of a woman.

More