Mark Singleton: Mark Singleton. Actor: Department S. Mark Singleton was born on 2 March 1919 in Thetford, Norfolk, England, UK. He was an actor and writer, known for Department S (1969), The Traitors (1962) and Salt and Pepper (1968). He died on 24 July 1986 in Westminster, London, England, UK.
Known For: Department S (Psychiatrist), The Traitors (Venner'The Traitor'), Salt and Pepper ('Fake' Home Secretary), Game for Vultures (Sir Benjamin Peckover)