Episode Titles: Substitution

 You are viewing a list of 2 The Big Bang Theory episodes featuring "Substitution" in their title.

  • The Zazzy Substitution

    Season 4, Episode 3 - The Zazzy Substitution
    Aired October 7, 2010

    When Sheldon and Amy argue over the importance of their respective fields, they decide to terminate their relationship. As Sheldon struggles to handle the break-up, he turns to feline companionship. Leonard gets concerned about his friend and calls in help.

  • The Line Substitution Solution

    Season 9, Episode 23 - The Line Substitution Solution
    Aired May 5, 2016

    Sheldon hires Stuart to spend the day with Amy when he'd rather go to a movie screening. Also, Leonard's mother, Beverly, comes to town and Penny struggles to make a connection with her.