Episode Titles: Perturbation

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

  • The Imitation Perturbation

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

    When Wolowitz dresses up as Sheldon for Halloween, Sheldon seeks retaliation at Leonard and Penny's Halloween party. Also, Leonard is shocked that Penny doesn't remember their first kiss.