He met his future wife Pam, daughter of silent film star Percy Marmont, at The Webber Douglas Academy of Dramatic Art.

Watson made his first appearance on stage while still a student at the Webber Douglas Academy of Dramatic Art at a matinee performance in memory of Ellen Terry at Hythe, Kent.

He appeared in several films, including Operation Crossbow and The Grass Is Greener, in which he played opposite Cary Grant, Deborah Kerr, Robert Mitchum and Jean Simmons.

He also appeared in the 1974 version of The Pallisers as Barrington Erle and in the Albert Campion mystery The Case of the Late Pig as the Chief Constable.

His final one-man show was written and devised by himself based on his own life as an actor, entitled Looking Back and Dropping Names, which was published in book form in September 2016.