Marguerite
Marguerite Courtot
Peter Enright
Richard Purdon
Leo - Frances' Husband
Frank Holland
Garrett - Leader of the Kidnappers [Ch. 3]
Robert Vaughn
(as J. Harry Edwards)
Harry Edwards
Hal Worth [Ch. 4]
F.B. Vernoy
Durbar - an Oriental Mystic [Ch. 4]
Walter McEwen
Martha - one of Durbar's Victims [Ch. 4]
Anna Reader
Carlow - a Fortune Hunter [Ch. 5]
Otto Niemeyer
Morton - Carlow's Accomplice [Ch. 5] /
Freeman Barnes
Bolton - Head of a Band of Crooks [Ch. 8] (as H.E. Barrows)
Henry A. Barrows
Irene - Bolton's Accomplice [Ch. 8]
Stella Jenno
Ferris - a Broker (as E.T. Roseman)
Edward Roseman
Gungha [Ch. 9]
A. Lever
Alota - Gungha's Accomplice [Ch. 9]
Eleanor Lewis
Bertha - Gungha's Accomplice [Ch. 9]
Lois Howell
Kagler - Bob's Assistant [Ch. 10]
R.A. Bennett
Wharton - a Foreign Agent [Ch. 10]
Joseph Sullivan
Roland Bottomley
Forrest Cummings
Hassan Mussalli
Hal Worth [Ch. 5] / Bob Winters [Ch. 6-16]
Bradley Barker
Rudolph [Ch. 6]
William Sherwood
Paula Sherman
Dangler - an Adventurer [Ch. 7]
Edwin Brandt
Martha [Ch. 6]
Julia Hurley
Fenton - Ferris' Partner
Phil Hardy
Frances - Marguerite's Maid
Helen Lindroth
Director
Robert Ellis
John Mackin
Hamilton Smith