Ian Wolfe later appeared on Star Trek
Ian Wolfe who played Robert the Butler later appeared as Mr Atoz in the classic Star Trek "Episode: TOS 078 - All Our Yesterdays".
http://www.startrek.com/startrek/view/library/character/bio/1119604.html
He shares the same credits as actor Reggie Nalder who played the role of assasin in Alfred Hitchcocks "The Man Who Knew To Much" (circa 1956)who later played Ambassador Shras the Andorian in the classic TOS episode "Journey To Babel"
http://www.memory-alpha.org/en/wiki/Shras
Gene Roddenbury must have been a big fan of Alfred Hitchcock.