The Donation Oscillation

Overview

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.

Guest Stars

Keith Carradine

Wyatt Teller

Eric Nenninger

Neil

Brian Thomas Smith

Zack Johnson

Rati Gupta

Anu

Lindsey Kraft

Marissa Johnson