The second man to walk on the moon just got a first rate gig. Buzz Aldrin will make a cameo as himself on the Halloween episode of "The Big Bang" theory on CBS. Aldrin, who's past credits -- aside from moon walking -- included "The Simpsons" and "Dancing With the Stars," wil make an appearance in the episode entitled "The Holographic Excitation." The episode will air on Oct. 25.