Summer will play herself in the March 9 episode of The Big Bang Theory (8PM – CBS)

Episode 2×17 The Terminator Decoupling
A train trip to San Francisco takes a major detour when Leonard, Sheldon, Wolowitz, and Raj discover that their favorite sci-fi actress in all the land is on board. But the fanboy frenzy quickly gives way to a heated mass debate when they realize one of them will have to approach her — but who?