Rik Le Salles
Rudolph Van Alten
Dr. Traherne
Roger Wainright
Nick Lansing
Boston Blackie
Ralph Stevens
Gil Pérez
Arnold Pell
Sir Henry Bond
Dion Holme
Colonel Richard Loring
Captain Warkworth
Peter Derwynt
Stuart Kent
Paul Sernine (aka Arsene Lupin)
Edward Knox
Martin Wesley
John Manning
Richard Page
Gerald Forster
Walter Maxwell
Geoffrey Sherwood
John Locke
Capt. Richard Townsend
Richard Freneau - A Broker
Gerald Austen
M. Henri De St. Hillaire
