A university chemistry professor experiments with an ancient Mayan gas on a medical student, turning the would-be surgeon into a murdering ghoul as part of a plan to steal his lover.
George Zucco
as Dr. Alfred Morris
David Bruce
as Ted Allison
Evelyn Ankers
as Isabel Lewis
Turhan Bey
as Eric Iverson
Robert Armstrong
as 'Scoop' McClure
Milburn Stone
as Sgt. Macklin
Addison Richards
as Editor Gavigan
Rose Hobart
as Della Elliott, reporter
Andrew Tombes
as Mortician Eagan
Charles McGraw
as Detective Garrity
Lillian Cornell
as Isabel's Singing Voice (voice) (uncredited)
Gus Glassmire
as 1st Cemetery Caretaker
