Episode Titles: Derivation

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

  • The Toast Derivation

    Season 4, Episode 17 - The Toast Derivation
    Aired February 24, 2011

    With Leonard and Priya now dating, the gang are spending more time at Priya's apartment. Sheldon is uncomfortable with this change but is powerless to stop it. After realizing Leonard is the center of their social group, not him, Sheldon sets out to find a new group of friends who will have fun his way. Meanwhile, Penny tries to move on after seeing Leonard in his new relationship.

  • The Grant Allocation Derivation

    Season 12, Episode 7 - The Grant Allocation Derivation
    Aired November 1, 2018

    Leonard is caught between a rock and a hard place when he's responsible for distributing extra grant money. Also, Bernadette turns the backyard playhouse into a hideaway from her husband and kids.