Roderick Smith

as Willy Urlowe ("The Contraption")

as John Newman (2 episodes), as John (4 episodes)

as Bob

as Marcadé

as Verges

as Journalist

as Voltemand

as Gordon (1 episode)

as Detective

as Sgt Keith Lardner (56 episodes)

as Whiskers (1 episode)

as Gary Belstead (1 episode)

as Cliffie

as Hiseman

as Student (uncredited)

as Miner (uncredited)

as Philip Larch (3 episodes)

as Cruikshank (2 episodes)