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The Big Bang Theory

2007 • E4
4.8
5.64K reviews
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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

Two and a Half Men" co-creator/executive producer Chuck Lorre and "Gilmore Girls" co-executive producer Bill Prady team up to create "The Big Bang Theory," a new 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 who moves in next door.

Ratings and reviews

4.8
5.64K reviews
Joshua Case
August 4, 2013
This show is brilliant. The bad reviews and ratings are because, apparently, everyone pirates or doesn't remember what a dvd is. This content has never been free and will never be legally free. Watching it on TV will let you watch an episode or two a day, but the reason you buy a dvd/rights to digital content is to not only watch it whenever you want but to support the show... You are all mentally challenged -_- I'm 'only 17' and I understand this, what did that day about you, you filthy, awful trolls....
244 people found this review helpful
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A Google user
August 3, 2013
This show just isnt funny. It tries so hard to be but I personally don't get the humour. I find it too obvious and the characters are irritating. Also kayley cuacos acting is atrocious. Plus what a rip off don't waste your money. And comparing it to friends is ridiculous friends was in a completely different league to this friends was actually funny, every episode had something funny for thw audience characters were well structured as were storylines and the acting wasnt terrible unlike this.
80 people found this review helpful
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Andrew Ashmore
January 15, 2016
Watched the entire thing more than once, i will admit that its not as geeky as it was when it first started but then the characters have grown up somewhat. Sheldon is annoying but fun to watch, at least leonard has stopped saying thank you after having sex;(we hope), penny penny penny looks much better with long hair. I just hope it doesnt run for 25 years and turn into the 'friends' of channel 4. Great show!
10 people found this review helpful
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