Boris Karloff (Dr. Charles Gaudet)
Nedda Harrigan (Mme. Lucien)
James Stephenson (Col. Armand)
Adia Kuznetzoff (Pierre)
Rolla Gourvitch (Colette)
Leonard Mudie (Advocate General)
Frank Reicher (President of Assize Court)
Dick Rich (Guard)
Charles Richman (Gov. Beaufort)
George Lloyd (Dogface)
Stuart Holmes (Gustav Le Brun)
Egon Brecher (Debriac)
Richard Bond (Georges)
John Hamilton (Ship's Captain)
Earl Gunn (Leon)
Earl Dwire
Sidney Bracey (Soupy)
Al Bridge
Harry Cording
Tom Wilson (Emil)
John Harmon (Andre)
Robert Warwick (Demontre)
Will Stanton (Bobo)
Edward Keane (Dr. Duval)
Pedro de Cordoba (Marcel)