Big Bang theory 12×15 is title The Donation Oscillation. Penny tries to seduce an abstaining Leonard to ruin his “donation” for her ex-boyfriend.

Big Bang Theory 12×15 promo images

























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synopsis

STORY BY: Bill Prady, Jeremy Howe, Adam Faberman

TELEPLAY BY: Steve Holland, Dave Goetsch, Maria Ferrari

DIRECTED BY: Mark Cendrowski

The Donation Oscillation” – 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, Feb. 7 (8:00-8:31 PM, ET/PT) on the CBS

Promo Trailer

REGULAR CAST:

Johnny Galecki (Leonard)

Jim Parsons (Sheldon)

Kaley Cuoco (Penny)

Simon Helberg (Wolowitz)

Kunal Nayyar (Koothrappali)

Mayim Bialik (Amy)

Melissa Rauch (Bernadette)

RECURRING CAST:

Keith Carradine (Wyatt)

Brian Thomas Smith (Zack)

Rati Gupta (Anu)

Lindsey Kraft (Marissa)



GUEST CAST:

Eric Nenniger (Neil)