The Big Bang Theory

2007
4.8
39.3K reviews
TV-UNRATED
Rating
Eligible
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Season 4 episodes (24)

1 The Robotic Manipulation
9/23/10
On the fourth season premiere, Penny (series star KALEY CUOCO) finds herself along for the ride on Sheldon's (series star JIM PARSONS) first date ever. Meanwhile, Wolowitz (series star SIMON HELBERG) finds a new use for a robotic arm. MAYIM BIALIK guest stars as Sheldon's date, Amy Fowler.
2 The Cruciferous Vegetable Amplification
9/30/10
When Sheldon realizes he won't live long enough to download his consciousness into a robot body, he attempts to extend his lifespan. Apple Co-Founder STEVE WOZNIAK guest stars as Himself.
3 The Zazzy Substitution
10/7/10
The guys are concerned as Sheldon searches for an alternative to human companionship after he and Amy (MAYIM BIALIK) break up. LAURIE METCALF reprises her role as Sheldon's mother.
4 The Hot Troll Deviation
10/14/10
An embarrassing secret of Wolowitz's comes to light, while Sheldon and Raj have a small war at work. Battlestar Galactica's KATEE SACKHOFF and Star Trek's GEORGE TAKEI guest star as themselves as Wolowitz's love gurus. MELISSA RAUCH reprises her role as Howard's girlfriend, Bernadette.
5 The Desperation Emanation
10/21/10
Leonard realizes he's the only one without a girlfriend, while Sheldon wants to get rid of his.
6 The Irish Pub Formulation
10/28/10
A visit from Raj's sister (guest star AARTI MANKAD) creates tension among the guys -- especially when Leonard keeps an affair secret from Sheldon, Howard and Raj.
7 The Apology Insufficiency
11/4/10
When an FBI agent (guest star ELIZA DUSHKU) interviews the guys for Wolowitz's security clearance, Sheldon's answers during the screening, put Wolowitz's clearance in jeopardy.
8 The 21 -Second Excitation
11/11/10
When the guys camp in line for a screening, their plans are thwarted by Sheldon's greatest nemesis, WIL WHEATON (guest starring as himself). Meanwhile, Penny and Bernadette invite Amy to her first slumber party.
9 The Boyfriend Complexity
11/18/10
Penny asks Leonard to lie to her father, Wyatt (guest star KEITH CARRADINE), while Howard, Raj and Bernadette pull an all-nighter at a telescope.
10 The Alien Parasite Hypothesis
12/9/10
Amy finds she has sexual feelings for Penny's ex, Zack (guest star BRIAN THOMAS SMITH) while Koothrappali and Wolowitz try to prove who would be the better superhero.
11 The Justice League Recombination
12/16/10
The guys find a "super" use for Penny's new boyfriend, Zack, when they enter a costume contest as the Justice League.
12 The Bus Pants Utilization
1/6/11
Leonard's idea for a smartphone app derails his friendship with Sheldon as they fight for control of the project.
13 The Love Car Displacement
1/20/11
Tension runs high when everyone is staying at the same hotel for a science event and Bernadette runs into her ex-boyfriend (guest star RICK FOX, three-time NBA champion with the Los Angeles Lakers).
14 The Thespian Catalyst
2/3/11
Sheldon wants Penny to give him acting lessons, hoping that they will help him become a better teacher. Meanwhile, Koothrappali fantasizes about his best friend's girlfriend.
15 The Benefactor Factor
2/10/11
A wealthy donor to the university makes Leonard consider how far he's willing to go for the sake of science. JESSICA WALTER (Arrested Development) guest stars as the widowed benefactress and JOSHUA MALINA (The West Wing) guest stars as the University President.
16 The Cohabitation Formulation
2/17/11
As Wolowitz contemplates taking things with Bernadette to the next level, he must choose between his girlfriend and his mother. Meanwhile, Leonard rekindles his relationship with Raj's sister, Priya.
17 The Toast Derivation
2/24/11
When the gang starts hanging out at Raj's and Sheldon realizes it's actually Leonard who is the center of their social group, Sheldon decides to get a new group of friends.
18 The Prestidigitation Approximation
3/10/11
Leonard must choose between his new girlfriend, Priya, and his friendship with Penny. Meanwhile, Howard drives Sheldon crazy with a magic trick.
19 The Zarnecki Incursion
3/31/11
When someone hacks Sheldon's online gaming account, the guys go on a quest to find the culprit.
20 The Herb Garden Germination
4/7/11
Sheldon and Amy experiment on their friends by spreading gossip, while Howard takes a big step in his relationship with Bernadette.
21 The Agreement Dissection
4/28/11
Priya uses her lawyer skills to pick apart the roommate agreement...and put Sheldon in his place. Meanwhile, the girls take Sheldon dancing.
22 The Wildebeest Implementation
5/5/11
Raj attempts to cure his social anxiety disorder of talking to women, while Penny uses Bernadette to spy on Leonard and his girlfriend.
23 The Engagement Reaction
5/12/11
When Howard finally breaks the news to his mom that he's engaged to Bernadette, it lands her in the hospital.
24 The Roomate Transmorgrification
5/19/11
When Bernadette receives her Ph.D., the guys take joy in reminding an emasculated Wolowitz that he is the only one in their group who isn't a doctor. Meanwhile, Koothrappali becomes Sheldon's new roommate after hearing Leonard and Priya engaging in a Star Trek bedroom fantasy, on the fourth season finale.

About this show

From "Two and a Half Men" co-creator Chuck Lorre and "Gilmore Girls" co-executive producer Bill Prady comes "The Big Bang Theory," a comedy about a pair of brilliant physicists who understand how the universe works but have no clue about how to interact with people… especially women…and specifically the free-spirited beauty next door.

Ratings and reviews

4.8
39.3K reviews
Amy
September 12, 2016
And since he was as dumb as a box of rocks, I hated most of the stuff he liked. While he'd laugh at Leonard and Sheldon's first season antics I was wondering when more reruns of Star Trek would be on and how my guild in World of Warcraft was fairing on their latest raid. You know, important stuff.
98 people found this review helpful
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Kenneth Brunstein
July 11, 2019
First off if this show offends you GOOD. You are weak person don't have children because we don't need anymore fingers in the pudding. You forgot how to enjoy yourself and laugh, at that point your life is not worth living and you should check out early. No body likes people who cry about everything or only looks for the negative just watch CNN because you cant think for yourself. Your not clever its not a new thing to wine about stupid things to think your edgy and hip. NO BODY CARES.. with that said this is a good show.
34 people found this review helpful
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Daniel Robinson
December 28, 2013
This show is funny and clever with all the characters showing development in there personality's . I don't know how the reviewer Izy comes to the conclusion that this show is politically incorrect considering the spectrum of the characters background and the balance of casts sexuality and religious beliefs or lack of in some cases, two gay,one Jew,one Hindu, one atheist, a couple of agnostics, one over the top christian. I am sure I have missed some characters (sorry).love the show may it continue forever
20 people found this review helpful
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