The Big Bang Theory

2007
4.7
2.28K reviews
TV-UNRATED
Rating
Eligible
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Season 4 episodes (24)

1 The Robotic Manipulation
23/9/10
Season-only
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
30/9/10
Season-only
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
7/10/10
Season-only
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
14/10/10
Season-only
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
21/10/10
Season-only
Leonard realizes he's the only one without a girlfriend, while Sheldon wants to get rid of his.
6 The Irish Pub Formulation
28/10/10
Season-only
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
4/11/10
Season-only
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
Season-only
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
18/11/10
Season-only
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
9/12/10
Season-only
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
16/12/10
Season-only
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
6/1/11
Season-only
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
20/1/11
Season-only
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
3/2/11
Season-only
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
10/2/11
Season-only
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
17/2/11
Season-only
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
24/2/11
Season-only
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
10/3/11
Season-only
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
31/3/11
Season-only
When someone hacks Sheldon's online gaming account, the guys go on a quest to find the culprit.
20 The Herb Garden Germination
7/4/11
Season-only
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
28/4/11
Season-only
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
Season-only
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
12/5/11
Season-only
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
19/5/11
Season-only
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

4.7
2.28K reviews
Monalee Rodriguez
4 May 2022
My absolute favorite!! No matter how many times I rewatch this show, it never fails to cheer me up or make me laugh. All of them were cast perfectly. I wish the show ran longer, but I think they ended it beautifully. I cried on the last episode. I haven't watched another show that topped this.
Shaun Laflamme
5 May 2017
When this show first aired I was not a person to watch it but after a few years I decided to give it a shot after some great comments and ABSOLUTELY LOVED IT, I went out and bought the first two seasons and binge watched it, now I own all episodes of this show, so if you are down and out and need a laugh I recommend taking 21 minutes to watch at least one episode, never know it might put that smile back on. This show is "Off the chain mail" Lenonard Hofstadter.
siddharth sharma
22 May 2020
I've just finished watching all 12 seasons, 232 episodes of the big bang theory for the 10th whole time, or 2320 episodes. I absolutely love this show, addicted, and I rewatch it as soon as I finish...I just saw the last episode, and Im gonna go watch the pilot right now