VIDEO: Sneak Peek - Tonight's Season Premiere of CBS's BIG BANG THEORY

On tonight's seventh season premiere of CBS's THE BIG BANG THEORY titled "The Hofstadter Insufficiency" and "The Deception Verification", Sheldon and Penny share intimate secrets while Leonard is away at sea.

Later, Sheldon's feelings are crushed when Leonard returns. Meanwhile, Raj gets consoled about his ex-girlfriend and Wolowitz's relationship with his mother causes an unusual threat to his masculinity.

The one-hour episode airs tonight, Thursday, Sept. 26 (8:00 – 9:01 PM, ET/PT) on the CBS Television Network. Regina King returns as Mrs. Davis, the University's Director of Employee Relations, and Kevin Sussman returns as Stuart, the comic book store owner. Get a sneak peek below!