: Ultimately, Leonard decides not to go through with it. He realizes he would be heartbroken to have a child in the world that he couldn't personally father. The "Vomit Comet"
: 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. : Ultimately, Leonard decides not to go through with it
: During the episode, Wyatt reveals a "noodle incident" from Penny's past: she once drunkenly stole a horse in high school. To prevent the donation—which requires Leonard to abstain
: Raj and Anu’s canceled bachelor party is repurposed into a group outing on a "Vomit Comet" (a weightless flight) for Raj, Anu, Howard, and Bernadette.
: 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