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Leonard and Sheldon are brilliant physicists - geniuses in the laboratory, but socially challenged everywhere else. Enter beautiful, street-smart neighbor, Penny, who aims to teach them a thing or two about life. Despite their on-again, off-again relationship in the past, Leonard believes he's found true love with Penny. Even Sheldon has found a female companion, entering into a "Relationship Agreement" with neurobiologist Amy Farrah Fowler. In their free time, Leonard and Sheldon continue to enjoy frequent trips to the comic book store and fantasy role-playing games with their ever-expanding universe of friends, including fellow scientists Koothrappali, Wolowitz and Wolowitz's adorable microbiologist wife, Bernadette. (source: www.cbs.com)

Genres: Comedy
Station: CBS (US)
Rating: 8.98/10 from 59 users
Status: Running
Start: 2007-09-24

The Big Bang Theory Season 4 Air Dates


S04E01 - The Robotic Manipulation Air Date: 24 September 2010 00:00 -

Penny finds herself along for the ride on Sheldon's first date ever; while Wolowitz finds a new use for a robotic arm.


S04E02 - The Cruciferous Vegetable Amplification Air Date: 01 October 2010 00:00 -

Sheldon realizes he won't live long enough to download his consciousness into a robot body, and attempts to extend his lifespan.


S04E03 - The Zazzy Substitution Air Date: 08 October 2010 00:00 -

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


S04E04 - The Hot Troll Deviation Air Date: 15 October 2010 00:00 -

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


S04E05 - The Desperation Emanation Air Date: 22 October 2010 00:00 -

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


S04E06 - The Irish Pub Formulation Air Date: 29 October 2010 00:00 -

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


S04E07 - The Apology Insufficiency Air Date: 05 November 2010 00:00 -

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


S04E08 - The 21-Second Excitation Air Date: 12 November 2010 01:00 -

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


S04E09 - The Boyfriend Complexity Air Date: 19 November 2010 01:00 -

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


S04E10 - The Alien Parasite Hypothesis Air Date: 10 December 2010 01:00 -

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


S04E11 - The Justice League Recombination Air Date: 17 December 2010 01:00 -

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


S04E12 - The Bus Pants Utilization Air Date: 07 January 2011 01:00 -

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


S04E13 - The Love Car Displacement Air Date: 21 January 2011 01:00 -

Tension runs high when everyone is staying at the same hotel for a science event and Bernadette runs into her ex-boyfriend.


S04E14 - The Thespian Catalyst Air Date: 04 February 2011 01:00 -

Sheldon hopes acting lessons from Penny will help him become a better teacher. Meanwhile, Koothrappali fantasizes about his best friend's girlfriend.


S04E15 - The Benefactor Factor Air Date: 11 February 2011 01:00 -

Wealthy donor to the university makes Leonard consider how far he's willing to go for the sake of science.


S04E16 - The Cohabitation Formulation Air Date: 18 February 2011 01:00 -

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


S04E17 - The Toast Derivation Air Date: 25 February 2011 01:00 -

Sheldon struggles to cope when he realizes it's actually Leonard who is the center of their social group.


S04E18 - The Prestidigitation Approximation Air Date: 11 March 2011 01:00 -

Leonard must choose between new girlfriend Priya and his friendship with Penny. Meanwhile, Howard drives Sheldon crazy with a magic trick.


S04E19 - The Zarnecki Incursion Air Date: 01 April 2011 00:00 -

When someone hacks Sheldon's online game account, the guys go on a quest to find the culprit.


S04E20 - The Herb Garden Germination Air Date: 08 April 2011 00:00 -

Sheldon and Amy experiment on their friends by spreading gossip, while Howard takes a big step in his relationship with Bernadette.


S04E21 - The Agreement Dissection Air Date: 29 April 2011 00:00 -

When Priya uses her lawyer skills to pick apart the roommate agreement, the girls take Sheldon dancing.


S04E22 - The Wildebeest Implementation Air Date: 06 May 2011 00:00 -

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


S04E23 - The Engagement Reaction Air Date: 13 May 2011 00:00 -

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


S04E24 - The Roommate Transmogrification Air Date: 20 May 2011 00:00 -

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.

The Big Bang Theory Actors

Laura Spencer(Emily Sweeney)

Johnny Galecki(Leonard Leakey Hofstadter)

Jim Parsons(Sheldon Lee Cooper)

Kaley Cuoco(Penny)

Simon Helberg(Howard Joel Wolowitz)

Kunal Nayyar(Rajesh Ramayan Koothrappali)

Mayim Bialik(Amy Farrah Fowler)

Melissa Rauch(Bernadette Marianne Rostenkowski)

Kevin Sussman(Stuart Bloom)

Sara Gilbert(Leslie Winkle)



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Next Episode of The Big Bang Theory is

Season 10 / Episode 11 and airs on 16 December 2016 01:00

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