Doc - A gruff, big-bellied flight engineer with several synthetic body parts on the sci-fi series SPACE RANGERS/CBS/1993. Doc, a.k.a. "Tin Man" (Jack McGee) worked for the Space Rangers, a law enforcement organization based at Fort Hope on the planet Avalon in the year 2104. Doc's body had been outfitted with a left prosthetic arm, a metal heart, a polyfoam knee, and a synthetic liver. The cigar-smoking Doc could repair just about anything but was always fearful that Central Command was going to force him to retire.