School for Secrets included a supporting role for which Scottish actor from "Dad's Army"?
School for Secrets:  In leading supporting roles were David Tomlinson, Raymond Huntley, Finlay Currie, Richard Attenborough, John Laurie and Michael Hordern. John Laurie: John Paton Laurie (25 March 1897 – 23 June 1980) was a Scottish actor.
i don't know