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Watch The Big Bang Theory

The Big Bang Theory

IMDB: 8.3/10ComedyRomance16+2007 - Present11 Seasons

The Big Bang Theory is centered on five characters living in Pasadena, California: roommates Leonard Hofstadter and Sheldon Cooper; Penny, a waitress and aspiring actress who lives across the hall; and Leonard and Sheldon's equally geeky and socially awkward friends and co-workers, mechanical engineer Howard Wolowitz and astrophysicist Raj Koothrappali. The geekiness and intellect of the four guys is contrasted for comic effect with Penny's social skills and common sense.

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Below you'll find every episode from all 11 season of The Big Bang Theory.
To see what is available free to watch, click the 'Episodes on Sources' tab above.

Season 11

CBS | CBS All Access | DirecTV Now | TV.com | Rent or Buy

Watch undefined Season 11 Episode 11 The Proposal Proposal

S11 E01

The Proposal Proposal Sep 26, 2017

In the eleventh season opener, Amy gives Sheldon an answer to his proposal while Howard and Bernadette struggle with some unexpected news.

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Watch undefined Season 11 Episode 11 The Retraction Reaction

S11 E02

The Retraction Reaction Oct 3, 2017

Leonard angers the university – and the entire physics community – after he gives an embarrassing interview. Also, Amy and Bernadette bond over having to hide their success from Sheldon and Howard.

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Watch undefined Season 11 Episode 11 The Relaxation Integration

S11 E03

The Relaxation Integration Oct 10, 2017

Sheldon struggles with picking a wedding date. Amy decides she wants a wedding near a cliff which Sheldon doesn't want. Meanwhile Raj and Stuart fight over one of Bernadette's co-workers.

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Watch undefined Season 11 Episode 11 The Explosion Implosion

S11 E04

The Explosion Implosion Oct 17, 2017

As Howard worries about fatherhood, he and Sheldon bond when they jointly assemble a model rocket. Meanwhile, Penny bonds with Leonard's mother, Beverly, much to his concern.

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Watch undefined Season 11 Episode 11 The Collaboration Contamination

S11 E05

The Collaboration Contamination Oct 24, 2017

Sheldon and Koothrappali confide in Bernadette when they can't handle Amy and Wolowitz working together. Also, Penny and Leonard learn new tactics for how to deal Sheldon from an unlikely source.

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Watch undefined Season 11 Episode 11 The Proton Regeneration

S11 E06

The Proton Regeneration Nov 3, 2017

Sheldon goes head-to-head with Wil Wheaton for the role of the new Professor Proton. Also, Penny steps in to take care of Halley when Bernadette and Wolowitz both wind up on bed rest.

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Watch undefined Season 11 Episode 11 The Geology Methodology

S11 E07

The Geology Methodology Nov 10, 2017

Sheldon and Bert collaborate on a research project, despite Sheldon’s embarrassment. Also, Penny and Bernadette coach Koothrappali on how to navigate his relationship with Ruchi.

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Season 10

DirecTV Now | TBS | Rent or Buy

Watch undefined Season 10 Episode 10 The Conjugal Conjecture

S10 E01

The Conjugal Conjecture Sep 20, 2016

After Sheldon’s mother and Leonard's father share an evening together, everyone deals with an awkward morning the next day. Also, Penny’s family arrives for the wedding ceremony, including her anxiety-ridden mother, Susan, and her drug dealing brother, Randall.

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Watch undefined Season 10 Episode 10 The Military Miniaturization

S10 E02

The Military Miniaturization Sep 27, 2016

Colonel Williams, an Air Force representative from the Department of Material Command sits down to talk with Wolowitz.

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Watch undefined Season 10 Episode 10 The Dependence Transcendence

S10 E03

The Dependence Transcendence Oct 4, 2016

Tensions rise when the boys struggle to complete their government project on time and Sheldon tries an energy drink to stay awake. Also, Penny and Amy go to a “party” at Bert the geologist’s house, and Koothrappali learns Bernadette’s true feelings about her pregnancy when they clean out the future baby room.

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Watch undefined Season 10 Episode 10 The Cohabitation Experimentation

S10 E04

The Cohabitation Experimentation Oct 11, 2016

When Amy’s apartment floods, she proposes a “cohabitation experiment” with Sheldon. Also, Howard and Bernadette are upset when Koothrappali learns the gender of the baby before they do.

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Watch undefined Season 10 Episode 10 The Hot Tub Contamination

S10 E05

The Hot Tub Contamination Oct 18, 2016

Leonard and Penny must separate a quarreling Sheldon and Amy when their cohabitation does not go as planned, and Sheldon threatens to break off their relationship when Amy refuses to adhere to the bathroom schedule. Also, Howard and Bernadette find unexpected guests at their house when they decide to stay home from a planned vacation.

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Watch undefined Season 10 Episode 10 The Fetal Kick Catalyst

S10 E06

The Fetal Kick Catalyst Oct 28, 2016

Penny is surprised to learn she has fans of her performance in "Serial Ape-ist" when she attends Van Nuys Comic Con with Leonard. Also, Amy hosts a Sheldon-style brunch at Penny’s apartment, and Wolowitz makes an impulsive purchase when he starts stressing out about the baby on the way.

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Watch undefined Season 10 Episode 10 The Veracity Elasticity

S10 E07

The Veracity Elasticity Nov 4, 2016

In order to continue living with Sheldon, Amy lies to him about repairs being made to her apartment and they host an "on location" episode of "Fun With Flags" in Penny’s apartment. Also, Leonard lets Penny decorate Sheldon’s old room after he learns that she has been secretly moving Leonard’s collectibles into storage.

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