Barry Williams who plays 'King Victor' was a neighbor of Peter Graves who he idolized.
Per the title, the Romani people in Spain are generally known as Gitanos.
Margarita Cordova was a flamenco dancer discovered by Marlon Brando for his film "One-Eyed Jacks".
Leonard Nimoy, Greg Morris, Margarita Cordova, Peter Mark Richman and former "Mission: Impossible" regulars Martin Landau and Barbara Bain were all members of the Theatre West, a Los Angeles based professional actor's workshop.
Rudy Solari and Barry Atwater both appeared in different shows of the original "Star Trek". Solari played Salish in "The Paradise Syndrome, and Atwater played Surak in "The Savage Curtain".