The Big Bang Theory: The Opening Night Excitation

Emmy Award winner Bob Newhart (The Bob Newhart Show) returns as Sheldon's Obi-Wan Kenobi -- it's his fourth appearance on the show -- in fall finale of The Big Bang Theory: "The Opening Night Excitation."

After more than five years of dating, Sheldon and Amy spend their first night together. Also, Leonard, Wolowitz, and Koothrappali must decide who will take their extra Star Wars movie ticket.

Below, check out 3 sneak peeks, a sneak preview and a behind-the-scenes featurette.

"The Opening Night Excitation" episode of The Big Bang Theory airs tonight at 8:00-8:32 PM ET/PT on CBS.