Cast
Victor Kilian
Jack Saunders (uncredited)
E. Alyn Warren
Dr. Turner (as Fred Warren)
Frederick Vogeding
Dr. Jones' Viennese Associate (uncredited)
James Flavin
Cop (uncredited)
Naomi Childers
Patient (uncredited)
Claire Du Brey
Dr. Jones' Nurse Hazel
Barbara Bedford
Miss Grant (uncredited)
John Miljan
Dr. Jones
Robert Middlemass
Hartney Drew
Clem Bevans
Mr. Greene (uncredited)