William Dexter

as Aaron Pendleton (uncredited)

as Doc

as Bertrand (1 episode)

as Mr. Pritchard

as Keppel (1 episode)

as Brian Martindale (2 episodes)

as Nickolai (1 episode)

as Arthur Balfour

as Parks

as Quayle

as Leclerc

as James Bowes (1 episode)

as Jack Swift (1 episode)

as Cardinal Mazarin (16 episodes)

as Henry Lyppiatt

as Sidi Faisal (6 episodes)

as Malo

as Major Riarkos (7 episodes)

as Dress Shop Owner

as Robert North (5 episodes)

as Det. Insp. Kleenan (4 episodes)

as Gabriel Linnet (1 episode), as Paul Zaglan (1 episode)

as Superintendent Hartley (1 episode)

as Lambert (2 episodes)

as Harry Parker