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