: Determined to prove Howard wrong, Bernadette goes on the flight. She spends the experience screaming in terror but ultimately claims to love it just to spite him. Key Trivia
: Although Penny initially said she was fine with it, she begins to have second thoughts. To prevent the donation—which requires Leonard to abstain from sex—she attempts to seduce him. [S12E15] The Donation Oscillation
: This episode marks the final appearances of Zack Johnson and Penny's father, Wyatt. : Determined to prove Howard wrong, Bernadette goes
: After Leonard declines, Sheldon expresses interest in donating his "superior" genetic material, but Amy immediately shuts him down. : Determined to prove Howard wrong