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Episode Titles: Perturbation

 You are viewing a list of 1 The Big Bang Theory episode featuring "Perturbation" in their title.

  • The Imitation Perturbation

    The Imitation Perturbation
    Season 12, Episode 6 - Aired October 25, 2018

    Sheldon is offended when Howard dresses up like him for Halloween, so he and Amy get their revenge at Leonard and Penny's Halloween party. Meanwhile, Leonard is surprised that Penny doesn't remember their first kiss.