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The Big Bang Theory

(1,234)8.2201112 SeasonsTV-NRSubtitles and Closed Captions

Worlds collided last season, when a love affair with Penny (Kaley Cuoco) opened a big, wide, wonderful world of romance for Leonard (Johnny Galecki). Sheldon (Jim Parsons), of course, likes the world just the way it is, thank you. But now, that Leonard and Penny have broken up again, they can test the variables of being neighbors once more.

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1. The Robotic Manipulation

On the fourth season premiere, Penny finds herself along for the ride on Sheldon's first date ever. Meanwhile, Wolowitz finds a new use for a robotic arm.

Subtitles and Closed Captions Language: English Runtime: 21 minutes Release date: September 22, 2010
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2. The Cruciferous Vegetable Amplification

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.

Subtitles and Closed Captions Language: English Runtime: 20 minutes Release date: September 29, 2010
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3. The Zazzy Substitution

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.

Subtitles and Closed Captions Language: English Runtime: 21 minutes Release date: October 6, 2010
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4. The Hot Troll Deviation

An embarrassing secret of Wolowitz's comes to light, while Sheldon and Raj have a small war at work. KATEE SACKHOFF and GEORGE TAKEI guest star as Wolowitz's love gurus.

Subtitles and Closed Captions Language: English Runtime: 19 minutes Release date: October 13, 2010
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5. The Desperation Emanation

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

Subtitles and Closed Captions Language: English Runtime: 20 minutes Release date: October 20, 2010
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6. The Irish Pub Formulation

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.

Subtitles and Closed Captions Language: English Runtime: 21 minutes Release date: October 27, 2010
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7. The Apology Insufficiency

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.

Subtitles and Closed Captions Language: English Runtime: 21 minutes Release date: November 3, 2010
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8. The 21 -Second Excitation

When the guys camp in line for a screening, their plans are thwarted by Sheldon's greatest nemesis, WIL WHEATON (guest starring as himself).

Subtitles and Closed Captions Language: English Runtime: 19 minutes Release date: November 10, 2010
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9. The Boyfriend Complexity

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.

Subtitles and Closed Captions Language: English Runtime: 20 minutes Release date: November 17, 2010
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10. The Alien Parasite Hypothesis

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.

Subtitles and Closed Captions Language: English Runtime: 20 minutes Release date: December 8, 2010
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11. 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.

Subtitles and Closed Captions Language: English Runtime: 20 minutes Release date: December 15, 2010
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12. The Bus Pants Utilization

Leonard's idea for a smartphone app derails his friendship with Sheldon as they fight for control of the project.

Subtitles and Closed Captions Language: English Runtime: 21 minutes Release date: January 5, 2011
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13. The Love Car Displacement

Tension runs high when everyone is staying at the same hotel for a science event and Wolowitz worries he can't measure up to Bernadette's ex-boyfriend (guest star RICK FOX).

Subtitles and Closed Captions Language: English Runtime: 21 minutes Release date: January 19, 2011
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14. The Thespian Catalyst

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.

Subtitles and Closed Captions Language: English Runtime: 21 minutes Release date: February 2, 2011
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15. The Benefactor Factor

A wealthy donor to the university (guest star JESSICA WALTER) makes Leonard consider how far he's willing to go for the sake of science.

Subtitles and Closed Captions Language: English Runtime: 19 minutes Release date: February 9, 2011
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16. The Cohabitation Formulation

As Howard contemplates taking things with Bernadette to the next level, he must choose between his girlfriend and his mother. Leonard rekindles his relationship with Raj's sister.

Subtitles and Closed Captions Language: English Runtime: 20 minutes Release date: February 16, 2011
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17. The Toast Derivation

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.

Subtitles and Closed Captions Language: English Runtime: 21 minutes Release date: February 23, 2011
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18. The Prestidigitation Approximation

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

Subtitles and Closed Captions Language: English Runtime: 20 minutes Release date: March 9, 2011
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19. The Zarnecki Incursion

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

Subtitles and Closed Captions Language: English Runtime: 21 minutes Release date: March 30, 2011
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20. The Herb Garden Germination

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

Subtitles and Closed Captions Language: English Runtime: 20 minutes Release date: April 6, 2011
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21. The Agreement Dissection

Priya uses her lawyer skills to pick apart the roommate agreement��_and put Sheldon in his place. Meanwhile, the girls take Sheldon dancing.

Subtitles and Closed Captions Language: English Runtime: 20 minutes Release date: April 27, 2011
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22. The Wildebeest Implementation

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

Subtitles and Closed Captions Language: English Runtime: 21 minutes Release date: May 4, 2011
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23. The Engagement Reaction

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

Subtitles and Closed Captions Language: English Runtime: 19 minutes Release date: May 11, 2011
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24. The Roomate Transmorgrification

After hearing Leonard and Priya indulge in a Star Trek bedroom fantasy, Raj moves in with Sheldon on the fourth season finale.

TV-NRSubtitles and Closed Captions Language: English Runtime: 21 minutes Release date: May 19, 2011
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