(written from a Production point of view)
Peter Brocco (16 January 1903 – 20 December 1992; age 89) was an character actor who played Claymare in the Star Trek: The Original Series first season episode "Errand of Mercy". His career, spanning six decades, resulted in parts in over two hundred movies and television episodes.
Brocco played in films such as Spartacus (1960, with Jean Simmons, John Hoyt, Arthur Batanides, William Blackburn, Paul Lambert, Dick Crockett, Seamon Glass, and narration by Vic Perrin), Our Man Flint (1966, with Roy Jenson, Chuck Hicks, and music by Jerry Goldsmith) and One Flew over the Cuckoo's Nest (1975, with Brad Dourif, Vincent Schiavelli, Christopher Lloyd, Louise Fletcher, Michael Berryman, and makeup by Fred Phillips).
Brocco died from a heart attack on 20 December 1992, aged 89.