Ted Sheldon
Inspector Joachim
Prof. Kenneth Parker
Phil Hubert
Phillippe
Lamont Cranston
Lamont Granston
Lawrence Thomas Jr.
Carl Schrottle
Neil DuBeck
Dick Clayton
Dan Elliott
Escurra, aka Captain Garcia
Jacques Benoit
Dr. Carl Lawrence
Bob Brown
Prince Albert
Montero
Frank Devereaux
Lastro
Glenn Abbott aka 'Dynamite'
Prince Ahmed
Himself (uncredited)
Captain Swagger / Hugh Drummond
Jaime Emmanuel Alvarado Montez
Roger Norman
Etienne Gerard
Prince Dimitry Ivanitch Nekhludov
Jerry Cleggett
Gideon Gory
Alan Beckwith
Braveheart
Amos Burden
Ronald Bentley
Admah Holtz
Kerry Harlan
Bruce McDow
King Garnet
Daniel Farr
Patrick Delaney
Capt. Alexei Czerny
Dan McTavish
Pedro Carrova
Jerry Langdon
Larry Grahame
Bob Standing
Mr. Brunelli
The Blackmailer
Bob Griswold
O.P. Dildock
Paul Braddock
Chauffeur