David Healy (May 15, 1929 – October 25, 1995) was an American actor who appeared in British and American television shows.Healy was born in New York City. His television credits include voices for the Supermarionation series Captain Scarlet and the Mysterons, Joe 90 and The Secret Service, as well as parts in UFO, The Troubleshooters, Randall and Hopkirk (Deceased), Strange Report, Dickens of London, Space Police (a TV pilot), Space Precinct and Dallas. He also starred as Dr. Watson opposite Ian Richardson's Sherlock Holmes in the 1983 TV film of The Sign of Four.His big screen credits include The Double Man (1967), Only When I Larf (1968), Assignment K (1968), Isadora (1968), Patton (1970), Lust for a Vampire (1971), Madame Sin (1972), Embassy (1972), Endless Night (1972), Twilight's Last Gleaming (1977), Winterspelt (1979), Supergirl (1984), and Haunted Honeymoon (1986). He also gave uncredited performances in the James Bond films You Only Live Twice (1967) and Diamonds Are Forever (1971). In 1983, Healy received the Laurence Olivier Award for Best Supporting Actor for his role in Guys and Dolls during the 1982 theatre season. His performance of "Nicely Nicely Johnson" was praised as "show-stopping" as he sang "Sit Down You're Rockin' the Boat". He performed a mid-show encore each night. In late 1980s he played the character of Buddy Plummer in the original London run of the Stephen Sondheim musical Follies at the Shaftesbury Theatre.Healy died following a heart operation on October 25, 1995 in London, England.