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