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

Slideshow posted in Photos | Friday, March 22, 2013

5 of 51: From left, actors Simon Helberg, Jim Parsons, Melissa Rauch and Johnny Galecki, from the cast of 'The Big Bang Theory,' appear 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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