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