Real world article
(written from a production point of view)
Johnny Mandell (24 January 1942–15 October 1994; age 52) was an actor who played one of Sulu's guards in the Star Trek: The Original Series second season episode "Mirror, Mirror". As a background performer, he was not credited for his role. He filmed his scenes on Thursday 27 July 1967 at Desilu Stage 9.
Aside from his appearance in Star Trek, he also had other uncredited roles on I Spy, I Dream of Jeannie, and Mannix. He had one credited role in 1969 on The Bill Cosby Show, with Nehemiah Persoff.