The Tangible Affection Proof

"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. Left: Penny (Kaley Cuoco), Right: Leonard (Johnny Galecki). Photo: Michael Yarish/Warner Bros. ©2013 Warner Bros. Television. All Rights Reserved.