 During his long career Watson appeared in numerous television series, including Dixon of Dock Green, Dr Finlay's Casebook, Taggart, Prime Suspect, Hamish Macbeth, Heartbeat (UK TV series), Two Thousand Acres of Sky, Inspector Rebus and Peak Practice.In "Your Cheatin' Heart" by John Byrne (Scottish playwright) he played six different parts.Following his return to Scotland in 1970 Watson worked regularly for the BBC and Granada Television, including appearances as Mobilis in Cedric Messina's production of "The Physicist" and the Miller in "The Canterbury Tales" for the BBC, for which he also appeared in such series and dramas as "The Standard", "Hunting Tower", "The Camerons", "The Nightmare Man" and "Govan Ghost Story".