Sara Shane
as Valerie
Paul Cavanagh
as Dr. Henry Giraud
Judy Nugent
as Judy
Richard Cutting
as Dr. Derwin Dodge
Helen Kleeb
as Mrs. Eden
Rudolph Anders
as Dr. Albert Fuss
Fred Nurney
as Dr. Laradetti
John Mylong
as Dr. Emil Hofer
Jack Kelly
as First Mechanic (uncredited)
Lisa Gaye
as Switchboard Girl (uncredited)
Charles Butterworth
as Tommy Masterson
Ralph Morgan
as Randolph