Colin Martin Douglas was an English actor. Born in Newcastle upon Tyne, Northumberland, Douglas was educated at the Farm School in Cumberland. Following his elder brother Jock, he emigrated to New Zealand when he was sixteen, working in sheep farming and lumberjacking, but only stayed for five years before auditioning to study at RADA, after begging his father to let him return to try to become an actor. He did some time in repertory, but the Second World War halted his career. In the armed forces he went to Catterick and the Royal Military College, Sandhurst, became Captain and Adjutant in the Border Regiment, and served in the 1st Airborne Division. During the Allied invasion of Sicily his glider, like many others, was released too early, and the crew were in the sea for two days. He was also dropped by glider at Arnhem, during the ill-fated Operation Market Garden but in later years was reluctant to talk about it. He was appearing on stage in Alan Plater's play Close the Coalhouse Door when he heard he had been chosen for a leading part in A Family at War. This popular series ran for 52 episodes from 1970.

The Trollenberg Terror is a 1958 British science fiction horror film produced by Robert S. Baker and Monty Berman and directed by Quentin Lawrence. The film stars Forrest Tucker, Laurence Payne, Janet Munro and Jennifer Jayne. The special effects are by Les Bowie. The story is based on a 1956 British ITV "Saturday Serial" television programme written by George F. Kerr, Jack Cross and Giles Cooper under the collective pseudonym of "Peter Key". The film was released as The Crawling Eye in the United States on 7 July 1958 by Distributors Corporation of America and as The Trollenberg Terror in the United Kingdom in October 1958 by Eros Films. It played on a double bill with the British science fiction film The Strange World of Planet X, retitled Cosmic Monsters for American audiences.