Guest Star: Briana Cuoco
The Tangible Affection Proof
Season 6, Episode 16 - Aired February 14, 2013
Leonard and Penny go on a double date with Howard and Bernadette on Valentine's Day, while Sheldon and Amy search for the perfect presents for each other. Meanwhile, Raj and Stuart throw a party for single people at the comic book store.
Appeared as Gretchen