SHELDON MUST FIND A VALENTINE'S GIFT FOR AMY, ON "THE BIG BANG THEORY," THURSDAY, FEB. 14

"The Tangible Affection Proof" - While the guys try to give their significant others the perfect Valentine's Day, Raj and Stuart throw a "lonely people" party at the comic book store, on THE BIG BANG THEORY, Thursday, Feb. 14 (8:00 - 8:31 PM, ET/PT) on the CBS Television Network.

CAST:

Johnny Galecki (Leonard)
Jim Parsons (Sheldon)
Kaley Cuoco (Penny)
Simon Helberg (Wolowitz)
Kunal Nayyar (Koothrappali)
Melissa Rauch (Bernadette)
Mayim Bialik (Amy)

GUEST CAST:

Kevin Sussman (Stuart)
Margo Harshman (Alex)
Josh Brener (Dale)
Kate Minucci (Lucy)
Briana Cuoco (Gretchen)

STORY BY: Chuck Lorre, Bill Prady and Steve Holland

TELEPLAY BY: Steven Molaro, Jim Reynolds and Tara Hernandez

DIRECTED BY: Mark Cendrowski

RATING: To Be Announced