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The Big Bang Theory

Leonard and Sheldon are brilliant physicists, but none of that genius helps them interact with people, especially women. All this begins to change when a free-spirited beauty, Penny, moves in next door. Sheldon is content spending his nights playing Klingon Boggle with their socially dysfunctional friends. However, Leonard sees in Penny a whole new universe of possibilities ... including love.
IMDb 8.1200624 episodes
TV-PG
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Episodes

  1. S5 E1 - The Skank Reflex Analysis
    September 21, 2011
    21min
    TV-14
    Penny worries that she's screwed things up permanently with her friends after her night with Raj, while Sheldon takes command of the paintball team.
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  2. S5 E2 - The Infestation Hypothesis
    September 21, 2011
    20min
    TV-14
    A battle of wills between Sheldon and Penny leaves Amy caught in the middle, while Leonard tries to spice up his long-distance relationship with Priya (AARTI MANN).
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  3. S5 E3 - The Pulled Groin Extrapolation
    September 28, 2011
    20min
    TV-PG
    Attending a co-worker's wedding, Leonard and Amy (MAYIM BIALIK) get to know each other better, while Howard and Bernadette spend the weekend with Mrs. Wolowitz!
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  4. S5 E4 - The Wiggly Finger Catalyst
    October 5, 2011
    20min
    TV-PG
    When Raj is upset he's the only one of the four guys who's not in a relationship, Penny sets out to find the perfect date, introducing him to Emily, a girl he can actually talk to!
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  5. S5 E5 - The Russian Rocket Reaction
    October 12, 2011
    21min
    TV-PG
    Sheldon and Leonard get invited to a housewarming party at WIL WHEATON's house; while Howard gets an out-of-this-world opportunity!
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  6. S5 E6 - The Rhinitis Revelation
    October 19, 2011
    21min
    TV-PG
    Sheldon craves attention from his visiting mother.
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  7. S5 E7 - The Good Guy Fluctuation
    October 26, 2011
    20min
    TV-14
    Sheldon tries to spook his friends on Halloween.
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  8. S5 E8 - The Isolation Permutation
    November 2, 2011
    21min
    TV-PG
    Bernadette & Penny shop for wedding dresses...without Amy.
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  9. S5 E9 - The Ornithophobia Diffusion
    November 9, 2011
    21min
    TV-PG
    Sheldon must overcome his fear of birds.
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  10. S5 E10 - The Flaming Spittoon Acquisition
    November 16, 2011
    21min
    TV-PG
    Sheldon becomes jealous when Stuart asks Amy for a date.
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  11. S5 E11 - The Speckerman Recurrence
    December 7, 2011
    20min
    TV-14
    Leonard comes face-to-face with his high school bully.
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  12. S5 E12 - The Shiny Trinket Maneuver
    January 11, 2012
    21min
    TV-PG
    Sheldon gets in trouble with Amy, and it's up to Penny to teach him how to be a better boyfriend. Howard, meanwhile, must come to grips with Bernadette's dislike of children.
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  13. S5 E13 - The Recombination Hypothesis
    January 18, 2012
    21min
    TV-14
    Everything might change when Leonard offers Penny a spur of the moment invitation to a romantic dinner for two on the 100th episode of the series.
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  14. S5 E14 - The Beta Test Initiation
    January 25, 2012
    20min
    TV-PG
    Leonard and Penny "beta test" their relationship.
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  15. S5 E15 - The Friendship Contraction
    February 1, 2012
    20min
    TV-PG
    Sheldon's selfish demands force Leonard to reconsider their friendship. Meanwhile, Howard tries to pick his astronaut nickname. NASA astronaut MIKE MASSIMINO guest stars.
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  16. S5 E16 - The Vacation Solution
    February 8, 2012
    21min
    TV-PG
    When Sheldon is forced to take a vacation by the university, he goes to work with Amy in her neurobiology lab.
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  17. S5 E17 - The Rothman Disintegration
    February 15, 2012
    21min
    TV-PG
    When a corner office at the University opens up, Sheldon must compete for it with his office nemesis, Barry Kripke. Meanwhile, Penny receives an unusual gift from Amy.
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  18. S5 E18 - The Werewolf Transformation
    February 22, 2012
    21min
    TV-PG
    A change in Sheldon's routine forces him to re-evaluate his entire life, when his barber is sick. Meanwhile, Howard rethinks his decision to go into space after astronaut training
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  19. S5 E19 - The Weekend Vortex
    March 7, 2012
    20min
    TV-PG
    Sheldon chooses to participate in a guys-only weekend Star Wars gaming marathon rather than go with Amy to her aunt's birthday party... and gets a lesson from Penny and Amy.
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  20. S5 E20 - The Transporter Malfunction
    March 28, 2012
    21min
    TV-PG
    It's a dream come true for Sheldon when he has a close encounter with his hero, Mr. Spock -- legendary sci-fi icon LEONARD NIMOY.
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  21. S5 E21 - The Hawking Excitation
    April 4, 2012
    19min
    TV-PG
    Sheldon has a chance to meet his hero, STEPHEN HAWKING.
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  22. S5 E22 - The Stag Convergence
    April 25, 2012
    22min
    TV-PG
    Howard's wedding plans are in jeopardy after the guys (and Wil Wheaton) throw him a bachelor party and details of his sexual history are leaked online.
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  23. S5 E23 - The Launch Acceleration
    May 2, 2012
    21min
    TV-PG
    When NASA reschedules Howard's mission and puts his wedding plans in jeopardy, he's forced to face his fears and Bernadette's dad (guest star CASEY SANDER).
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  24. S5 E24 - The Countdown Reflection
    May 9, 2012
    21min
    TV-PG
    As Howard prepares for his mission into space, flashbacks show the recent events leading up to his and Bernadette's wedding.
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