Kay is known for his roles in "", "Fall of Eagles", "I, Claudius", "The Devils Crown," "To Serve Them All My Days", "By the Sword Divided", "Fortunes of War", "Rumpole of the Bailey", "The Citadel", "Edge of Darkness", "The Darling Buds of May", "Jonathan Creek", "Hetty Wainthropp Investigates", "Holby City", "Midsomer Murders" and "The Casebook of Sherlock Holmes" story "The Creeping Man".