The same year Bela Lugosi played Ygor in SON OF FRANKENSTEIN, he played Dr. Zorkov here! Zorkov is a demented (what else!) mad scientist who has invented invisibility. The other star of the film is a huge....mean-lookin' robot with metal teeth! Edward Van Sloan (DRACULA/FRANKENSTEIN) co-stars.
Plus, a bonus cartoon - "Porky's Midnight Matinee."