Murray Matheson

as The clown

as Mr. Agee

as Nathan Bly (1 episode)

as Carl (1 episode)

as Sir Douglas Devereaux

as The Stranger

as Zacharias

as Specter (voice) (1 episode), as Statesman Geller (1 episode)

as Dr. Mario Lowell

as Roger (1 episode)

as Publisher

as Burnside (1 episode)

as Mr. Lane-Mariot (1 episode)

as Lord Arnold Dwellyn (voice / uncredited)

as Walter Moran (1 episode)

as Abbott

as Mathews (1 episode)

as Felix Mulholland (16 episodes)

as Walter Monckton

as Angus McFee (1 episode)

as Valentine Estes (1 episode)

as Owner of Jaguar

as Lord Charles Danby (1 episode), as Jeffrey Talbot (1 episode)

as Professor Dietrich (1 episode)