Chester Morris
Dr. Carlo Lombardi
Acting
Marla English
Andrea Talbott / Elizabeth Wetherby
Acting
Tom Conway
Timothy Chappel
Acting
Cathy Downs
Dorothy Chappel
Acting
Lance Fuller
Dr. Ted Erickson
Acting
Ron Randell
Police Lt. Ed James
Acting
Frieda Inescort
Mrs. Chappel
Acting
Frank Jenks
Plainclothes Sgt. with Lt James
Acting
El Brendel
Olaf, the butler
Acting
Paul Dubov
Johnny, the barker
Acting
William Hudson
Bob, the ex-fiancé
Acting
Flo Bert
Marta, the Maid
Acting
Jeanne Evans
Mrs. Brown
Acting
Kenneth MacDonald
Police Doctor with Prof. Anderson
Acting
Jack Mulhall
Lombardi's Lawyer
Acting
Edward Earle
Professor Anderson
Acting
Bess Flowers
Party Guest
Acting
Paul Blaisdell
The She-Creature
Visual Effects
Spike
King the Dog
Acting