David Powell

as Rudolph Van Alten

as Norman Wright

as Edmund Hyde

as Nick Lansing

as Dr. Traherne

as Roger Wainright

as Arnold Pell

as Gil Pérez

as Ralph Stevens

as The Baron

as Brian McCree

as Boston Blackie

as Geoffrey Kingsward

as Sir Henry Bond

as Colonel Richard Loring

as Captain Warkworth

as Dion Holme

as Peter Derwynt

as Edward Knox

as Stuart Kent

as Martin Wesley

as Louis Malcourt

as Paul Sernine (aka Arsene Lupin)

as John Manning

as Richard Page

as Paul Normand

as Richard Elliott

as Charles Cox

as Jack Spencer

as Blake Walford

as Gerald Forster

as Andre

as John Locke

as Geoffrey Sherwood

as Walter Maxwell

as Donald Keith

as Capt. Richard Townsend

as Richard Freneau - A Broker

as Dandy

as Gerald Austen

as M. Henri De St. Hillaire