S02E11: Lesser of Two Evils

The Professor hires Flexo -- a new robot who, despite a goatee, is an exact duplicate of Bender -- as extra security when the crew is asked to take a valuable jeweled tiara to the Miss Universe Contest. When the tiara turns up missing, Fry suspects Flexo and starts a cat-and-mouse chase throughout the pageant with Bob Barker guest starring as himself.