Rex Sevenoaks was an actor who spent much of his career in Canada. He played Mr. Thomas, the manager, in The Cube.
A year before The Cube, Sevenoaks appeared in the Canadian shot TV movie The Strange Case of Dr. Jekyll and Mr. Hyde (with Jack Palance and Billie Whitelaw). He had previously starred as Captain Boomer on the juvenile sitcom Barney Boomer and its spin-off Upside Down Town, appeared in experimental CBC dramas, and guest starred on The Forest Rangers. Film credits include The Trap and Kill and Kill Again. He acted on-stage with Lorne Greene in the Jupiter Theatre in the 1950s.
By the late 1970s, Sevenoaks had moved to South Africa, appearing occasionally in television and film (including the 1981 action movie Kill and Kill Again).