Watson has appeared in guest roles in numerous TV series such as Hawaii Five-O, Emergency!, McCloud, M*A*S*H, The Rockford Files, The A-Team, CHiPs, and Murder She Wrote, as well as movies including ...tick...tick...tick... (1970), The Wild Country (1970), Dirty Little Billy (1972), Charley and the Angel (1973), Papillon (1973), The Midnight Man (1974), Treasure of Matecumbe (1976), Up In Smoke (1978), Cujo (1983) and Bulletproof (1988). He also had a part in the TV miniseries War and Remembrance (1988), which he filmed in Hawaii.