The Big Bang Theory 12×15 All Sneak Peeks “The Donation Oscillation”

The Big Bang Theory 12×15 “The Donation Oscillation” Season 12 Episode 15 All Sneak Peeks – Penny tries to seduce an abstaining Leonard to ruin his “donation” for her ex-boyfriend, Zack (Brian Thomas Smith), and his wife, Marissa (Lindsey Kraft). Also, Wolowitz, Bernadette, Anu (Rati Gupta) and Koothrappali turn Koothrappali’s canceled bachelor party into a couple’s trip aboard the “vomit comet,” on THE BIG BANG THEORY, Thursday, February 7th on CBS. Keith Carradine returns as Penny’s father, Wyatt.