John Strickland
Col. Rudolph von Knorr
Sir John Dare
David Poe Jr (as Hugh E. Thompson)
Robert Sinclair
Hugh Maxwell
Henry Taylor
Cecil Andrews
Salvatore, Ruth's father
José María Lavendera
John King
Pike
Dr. Maynard Drew
Lawson
Gene
Sir Edward Leighton
Ross Kennion
John Alden
John Schuyler
Jeb
Arnold Blair
Prince Hero
John Arms
Harold Chase