'Big Bang Theory' cast performs 'Rocky Horror's 'Time Warp' (Photos)

Slideshow posted in Photos | Friday, March 22, 2013

36 of 51: Actor Zachary Levi performs at the 21st Annual 'A Night at Sardi's' to benefit the Alzheimer's Association at the Beverly Hilton Hotel on Wednesday, March 20, 2013 in Beverly Hills, California. ( Photo / Jordan Strauss / Invision for Alzheimer's Association / AP Images)

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