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Danny Kaye guest stars as Dr. Burns, a puckish dentist who tries his best (and then some) to allay the fears of Rudy's friend Peter (Peter Costa) when the boy balks at sitting in Burns' chair to have a toothache treated. And back at the Huxtable house, Cliff (Bill Cosby) suffers sleep deprivation thanks to the loud and incessant outrage expressed by Clair (Phylicia Rashad) over a newspaper article. This episode was originally telecast on a Sunday, rather than The Cosby Show's usual Thursday-night timeslot, as a lead-in to the NBC miniseries Peter the Great.