Physicists Leonard and Sheldon find their nerd-centric social circle with pals Howard and Raj expanding when aspiring actress Penny moves in next door.
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see all options Availability data: JustWatch
- Seasons
- 12
- Episodes aired
- 279
- Latest aired
- S12E23
- Total runtime
- 3d 22h
Timeline when each season aired
- Season 1 September 2007 – May 2008 17 episodes
- Season 2 September 2008 – May 2009 23 episodes
- Season 3 September 2009 – May 2010 23 episodes
- Season 4 September 2010 – May 2011 24 episodes
- Season 5 September 2011 – May 2012 24 episodes
- Season 6 September 2012 – May 2013 24 episodes
- Season 7 September 2013 – May 2014 24 episodes
- Season 8 September 2014 – May 2015 24 episodes
- Season 9 September 2015 – May 2016 24 episodes
- Season 10 September 2016 – May 2017 24 episodes
- Season 11 September 2017 – May 2018 24 episodes
- Season 12 September 2018 – May 2019 24 episodes
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S06E01 The Date Night Variable
September 27 · 21min find the promo
Show synopsis
With his friends on dates, Raj must face his loneliness. Also, Wolowitz is caught in an argument between Bernadette and his mom, even while he’s in space.
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S06E02 The Decoupling Fluctuation
October 4 · 21min find the promo
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When Sheldon learns that Penny is thinking about breaking up with Leonard, he tries to intervene. Meanwhile, in space, the other astronauts pick on Howard.
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S06E03 The Higgs Boson Observation
October 11 · 19min find the promo
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Amy feels threatened when Sheldon hires a young female assistant, and the pressure of being in space takes its toll on Wolowitz.
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S06E04 The Re-Entry Minimization
October 18 · 21min find the promo
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When Wolowitz returns from space, he doesn’t get the hero’s welcome he expected. Meanwhile, Game Night turns into a battle of the sexes.
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S06E05 The Holographic Excitation
October 25 · 21min find the promo
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The gang celebrates Halloween at Stuart’s comic book store. Meanwhile, Leonard seduces Penny with science.
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S06E06 The Extract Obliteration
November 1 · 21min find the promo
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Sheldon’s relationship with Stephen Hawking is threatened over a game of “Words with Friends,” and Penny secretly enrolls in a class at the local college.
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S06E07 The Habitation Configuration
November 8 · 21min find the promo
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Wolowitz struggles with moving out of his mother’s house. Meanwhile, Sheldon is caught in the middle of an argument between Amy and Wil Wheaton.
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S06E08 The 43 Peculiarity
November 15 · 21min find the promo
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Raj and Howard try to to figure out why Sheldon disappears at 2:45 every afternoon; jealousy arises in Penny and Leonard's relationship.
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S06E09 The Parking Spot Escalation
November 29 · 20min find the promo
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When the University reassigns Sheldon’s parking spot to Wolowitz, their fight affects the whole gang.
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S06E10 The Fish Guts Displacement
December 6 · 21min find the promo
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When Amy gets sick, Sheldon tries to nurse her back to health; Wolowitz and his father-in-law plan a fishing trip.
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S06E11 The Santa Simulation
December 13 · 21min find the promo
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During a Dungeons and Dragons game, Sheldon revisits Christmas memories; Amy, Penny and Bernadette look for a date for Raj.
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S06E12 The Egg Salad Equivalency
January 3 · 21min find the promo
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When Sheldon is accused of sexual harassment, he ends up getting Raj, Leonard and Howard in trouble.
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S06E13 The Bakersfield Expedition
January 10 · 21min find the promo
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As the guys don costumes and go on a road trip to a comic book convention, the ladies decide to stay home and try to interpret a comic book.
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S06E14 The Cooper/Kripke Inversion
January 31 · 20min find the promo
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Sheldon faces a crisis of confidence when he is forced to work with his nemesis, Barry Kripke; Raj and Howard buy expensive action figures of themselves.
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S06E15 The Spoiler Alert Segmentation
February 7 · 21min find the promo
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A fight between Sheldon and Leonard impacts Amy and Penny's living arrangements; while Howard is away, Raj helps Mrs. Wolowitz out.
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S06E16 The Tangible Affection Proof
February 14 · 21min find the promo
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The guys search for a perfect Valentine's Day gift for their significant others; Stuart and Raj host a "lonely people" party at the comic book store.
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S06E17 The Monster Isolation
February 21 · 19min find the promo
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After a bad date, Koothrappali decides to never leave his apartment; Penny's acting skills impress Sheldon.
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S06E18 The Contractual Obligation Implementation
March 7 · 20min find the promo
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Leonard, Sheldon and Howard give lectures on science to junior high students. The girls ditch work to go to Disneyland. Raj devises a date for Lucy that fixes their social anxiety problems.
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S06E19 The Closet Reconfiguration
March 14 · 20min find the promo
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Howard considers whether or not he should open a letter from his father; Penny and Leonard host a "grown-up" cocktail party.
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S06E20 The Tenure Turbulence
April 4 · 19min find the promo
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The girls get involved when Leonard, Sheldon and Raj compete for tenure at the University.
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S06E21 The Closure Alternative
April 25 · 20min find the promo
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Amy tries to help Sheldon get over his compulsive need for closure when one of his favorite TV shows is canceled; Raj discovers a secret about Lucy.
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S06E22 The Proton Resurgence
May 2 · 21min find the promo
Show synopsis
Leonard and Sheldon hire the host (Bob Newhart) of their favorite childhood TV show to perform; Bernadette and Howard run into trouble while dog-sitting for Raj's pet.
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S06E23 The Love Spell Potential
May 9 · 21min find the promo
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A date between Raj and Lucy takes both of them out of their comfort zones. After a trip to Las Vegas goes awry, the girls join in on a Dungeons and Dragons game, which causes Amy and Sheldon to re-evaluate their relationship.
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S06E24 The Bon Voyage Reaction
May 16 · 20min find the promo
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When Leonard receives an exciting opportunity to work overseas, Penny and Sheldon are thrown for a loop. Raj and Lucy's relationship comes to a crossroad.