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