STAGE TUBE: Sneak Peek - Amy Sings the Blues on Tonight's THE BIG BANG THEORY

On tonight's episode of CBS' THE BIG BANG THEORY, titled The Isolation Permutation, Amy is crushed when Bernadette and Penny go shopping for wedding dresses without her. 

THE BIG BANG THEORY follows Leonard and Sheldon who are brilliant physicists - wizards in the laboratory, but socially inept outside of it. Enter beautiful, free-spirited neighbor, Penny, who aims to teach them a thing or two about life. While Leonard spends his days looking for love, Sheldon is quite content video-chatting with platonic partner Amy Farrah Fowler, or playing Star Trek 3D Chess with their ever-expanding universe of friends, including fellow scientists Koothrappali and Wolowitz, and Wolowitz' fiancée, the adorable microbiologist, Bernadette.

THE BIG BANG THEORY airs Thursdays from 8:00 - 8:30 PM, ET/PT on the CBS network.

To view a clip from tonight's episode, click below!