[s12e15] The Donation Oscillation «500+ QUICK»

: After Leonard declines, Sheldon expresses interest in donating his "superior" genetic material, but Amy immediately shuts him down.

: 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. [S12E15] The Donation Oscillation

: This episode marks the final appearances of Zack Johnson and Penny's father, Wyatt. : After Leonard declines, Sheldon expresses interest in