Christian Roberts (actor)
Christian Charles Roberts (born 17 March 1944, Southmoor, Oxfordshire) is an English actor, best remembered for his film debut role as the rebellious Denham in the 1967 film "To Sir, with Love" starring Sidney Poitier and Judy Geeson. Fans of the late 1960s cult science-fiction show "UFO" remember Roberts as the hippie-turned-alien spy in the final episode “The Long Sleep”. Early life. Roberts was educated at Cranleigh School, Surrey and at the Royal Academy of Dramatic Art. Much of his acting career was in theatre.