Leonard and Sheldon are brilliant physicists, 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.
The Big Bang Theory Season 4 (2010-2011)
|4x01 The Robotic Manipulation |
Sheldon has been communicating with Amy Farrah Fowler for the past few months via text messages. Penny convinces Sheldon he should go on a date with her after he informs the group that ...
|Sep. 23, 2010|
|4x02 The Cruciferous Vegetable Amplification |
Determined to live long enough for the moment when man and machine become one, Sheldon decides he must cease all physical contact with the outside world. Using a computer screen and ...
|Sep. 30, 2010|
|4x03 The Zazzy Substitution |
After having a major disagreement about whose work is more important, Sheldon and Amy Farrah Fowler decide to end their relationship. As a means of coping, Sheldon begins to acquire ...
|Oct. 07, 2010|
|4x04 The Hot Troll Deviation |
An embarrassing secret of Wolowitz's comes to light, while Sheldon and Raj have a small war at work.
|Oct. 14, 2010|
|4x05 The Desperation Emanation |
Leonard is depressed to realize all the other guys have girlfriends, while he doesn't. Amy wants to introduce Sheldon to her mother.
|Oct. 21, 2010|
|4x06 The Irish Pub Formulation |
A visit from Raj's sister coincides with Leonard becoming secretive.
|Oct. 28, 2010|
|4x07 The Apology Insufficiency |
The rest of the gang is interviewed by the FBI for Wolowitz's security clearance.
|Nov. 04, 2010|
|4x08 The 21-second Excitation |
While the guys camp in line for a long-awaited movie screening, Penny and Bernadette invite Amy (Mayim Bialik) to her first slumber party.
|Nov. 11, 2010|
|4x09 The Boyfriend Complexity |
Penny asks Leonard to lie to her father, while Howard, Raj and Bernadette pull an all-nighter at a telescope. Source: CBS
|Nov. 18, 2010|
|4x10 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.
|Dec. 09, 2010|
|4x11 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.
|Dec. 16, 2010|
|4x12 The Bus Pants Utilization |
Leonard's idea for a smartphone app derails his friendship with Sheldon.
|Jan. 06, 2011|
|4x13 The Love Car Displacement |
Bernadette encounters her ex-boyfriend (Rick Fox) while attending a science event with Wolowitz.
|Jan. 20, 2011|
|4x14 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.
|Feb. 03, 2011|
|4x15 The Benefactor Factor |
A wealthy donor to the university makes Leonard consider how far he's willing to go for the sake of science.
|Feb. 10, 2011|
|4x16 The Cohabitation Formulation |
As Wolowitz contemplates taking things with Bernadette to the next level, Leonard rekindles his relationship with Raj's sister.
|Feb. 17, 2011|
|4x17 The Toast Derivation |
Sheldon struggles to cope when he realizes it's actually Leonard who is the center of their social group.
|Feb. 24, 2011|
|4x18 The Prestidigitation Approximation |
Priya disapproves of Leonard continuing to be friends with Penny, so he has to choose between Priya and Penny. Sheldon is baffled by Wolowitz's magic trick.
|Mar. 10, 2011|
|4x19 The Zarnecki Incursion |
When Sheldon has his online gaming account hacked and his character stolen from, the guys team up in order to discover out who did it.
|Mar. 31, 2011|
|4x20 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.
|Apr. 07, 2011|
|4x21 The Agreement Dissection |
The girls take Sheldon dancing while Priya, as a experienced lawyer, tries to break apart 'the roommate agreement'.
|Apr. 28, 2011|
|4x22 The Wildebeest Implementation |
Raj tries to cure himself from his 'social anxiety disorder' that appears when he is talking to women. Penny will use Bernadette to spy on Leonard and his new girlfriend Priya.
|May. 05, 2011|
|4x23 The Engagement Reaction |
Bernadette and Mrs. Wolowitz have a “get-to-know-ya” lunch at a deli. Howard hopes that once his mom sees how wonderful Bernadette is, she’ll welcome her into the family like ...
|May. 12, 2011|
|4x24 The Roommate Transmogrification |
When Bernadette receives her PhD, the guys take joy in reminding an emasculated Wolowitz that he is the only one in their group who isn't a doctor; Raj becomes Sheldon's new roommate ...
|May. 19, 2011|
Season 4 Characters[none added]
Season 4 Videos[none added]
Season 4 Trivia[none added]
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