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 - 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 - Aired November 1, 2018
When Leonard is tasked with distributing extra grant money, he struggles with his desire to please everyone. Meanwhile, Bernadette seeks refuge in the backyard playhouse when she feels overwhelmed by work and family life.