The Big Bang Theory S12E15 · The Donation Oscillation

The Big Bang Theory

Season 12 · Episode 15 · The Donation Oscillation · 22 min

Penny tries to seduce an abstaining Leonard to ruin his "donation" for her ex-boyfriend, Zack, and his wife, Marissa. Also, Wolowitz, Bernadette, Anu and Koothrappali turn Koothrappali's canceled bachelor party into a couple's trip.