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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S05E01 The Skank Reflex Analysis
September 22 · 21min find the promo
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Penny is worried with how damaged her friendship with the guys will be in the aftermath of her sleeping with Raj while Sheldon becomes the leader of the paintball team.
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S05E02 The Infestation Hypothesis
September 22 · 20min find the promo
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A fight between Sheldon and Penny leaves Amy caught in the middle, while Leonard tries to spice up his long-distance relationship with Priya.
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S05E03 The Pulled Groin Extrapolation
September 29 · 20min find the promo
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Leonard and Amy get to know each other better, while Howard and Bernadette spend the weekend with Mrs. Wolowitz.
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S05E04 The Wiggly Finger Catalyst
October 6 · 20min find the promo
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Penny plays Matchmaker for Raj, which results in him finding a girl he is comfortable talking to.
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S05E05 The Russian Rocket Reaction
October 13 · 21min find the promo
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Sheldon and Leonard get invited to a party at Wil Wheaton's house, and Howard gets an out-of-this-world opportunity.
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S05E06 The Rhinitis Revelation
October 20 · 21min find the promo
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Sheldon's mother, Mary Cooper, comes to visit, but Sheldon is annoyed that she also spends time with the rest of the gang, instead of catering to his every demand.
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S05E07 The Good Guy Fluctuation
October 27 · 20min find the promo
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A cute comic book artist puts Leonard and Priya’s relationship to the test, while Sheldon tries to scare the guys for Halloween.
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S05E08 The Isolation Permutation
November 3 · 21min find the promo
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Amy becomes heartbroken when she discovers that Penny and Bernadette went wedding dress shopping without her.
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S05E09 The Ornithophobia Diffusion
November 10 · 21min find the promo
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Leonard and Penny try hanging out as friends on a 'non-date', but end up purposely ruining each others chances with perspective dates. Meanwhile, Sheldon enlists the help of Bernadette and Amy to overcome his fear of birds.
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S05E10 The Flaming Spittoon Acquisition
November 17 · 21min find the promo
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When Stuart asks Amy out on a date, Sheldon must confront his feelings and consider where his relationship with Amy is going.
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S05E11 The Speckerman Recurrence
December 8 · 20min find the promo
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Leonard must face his fears after being contacted by his high school tormentor.
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S05E12 The Shiny Trinket Maneuver
January 12 · 21min find the promo
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Sheldon gets in trouble with Amy when he isn't impressed by her recent accomplishment, and Howard must come to grips with Bernadette's dislike of children.
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S05E13 The Recombination Hypothesis
January 19 · 21min find the promo
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Leonard, who broke up with Priya, asks Penny out to a spur-of the-moment romantic dinner for two, and the duo contemplates on their relationship.
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S05E14 The Beta Test Initiation
January 26 · 20min find the promo
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Leonard and Penny deal with the idea of starting a relationship again and Raj finally finds a "woman" he can talk to without being drunk, in the form of Siri on his new phone. Meanwhile, Sheldon decides to start a YouTube series entitled "Sheldon Cooper presents Fun with Flags" with the help of Amy.
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S05E15 The Friendship Contraction
February 2 · 20min find the promo
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Sheldon's selfish demands force Leonard to reconsider their friendship. Meanwhile, Wolowitz tries to pick his astronaut nickname.
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S05E16 The Vacation Solution
February 9 · 21min find the promo
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When Sheldon is forced to take his vacation, he goes to work with Amy in her neurobiology lab.
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S05E17 The Rothman Disintegration
February 16 · 21min find the promo
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Sheldon battles Kripke for a coveted office at the university. Penny receives a very unusual gift from Amy.
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S05E18 The Werewolf Transformation
February 23 · 21min find the promo
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Sheldon becomes agitated when his regular barber is out sick. Astronaut training causes Howard to reconsider wanting to go into space. Penny beats Leonard in chess, the first time she plays.
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S05E19 The Weekend Vortex
March 8 · 20min find the promo
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Sheldon must choose between joining Amy at her aunt's birthday party or playing videogames all weekend with the guys.
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S05E20 The Transporter Malfunction
March 29 · 21min find the promo
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Penny buys Leonard and Sheldon “Star Trek” collectibles as a thank-you, leading Sheldon to be haunted by Mr. Spock. Meanwhile, Raj decides he has met the “Future Mrs. Koothrappali” after his parents set him up on a date.
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S05E21 The Hawking Excitation
April 5 · 19min find the promo
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When Wolowitz gets to work with Stephen Hawking, Sheldon is willing to do anything to meet his hero.
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S05E22 The Stag Convergence
April 26 · 21min find the promo
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After the guys throw Howard a bachelor party, Bernadette reconsiders marrying him after learning about his sexual history.
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S05E23 The Launch Acceleration
May 3 · 21min find the promo
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When NASA moves up Howard's mission, he must face his fears and Bernadette's dad, thus putting the wedding plans in jeopardy. Meanwhile, Leonard says something surprising to Penny in the bedroom.
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S05E24 The Countdown Reflection
May 10 · 20min find the promo
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The fifth season ends with Howard and Bernadette deciding to get married before his NASA mission, causing the gang to scurry into overdrive in an effort to stage the wedding. NASA astronaut Mike Massimino has a cameo as himself.