A scientist working on cures for rare afflictions, such as a bone softening agent made from molds to allow him to correct the spinal deformity of his nurse, finds the physical causes of lycanthropy in wolf-man Larry Talbot and of vampirism in Count Dracula, but himself becomes afflicted with homicidal madness while exchanging blood with Dracula.
John Carradine
as Count Dracula
Onslow Stevens
as Dr. Franz Edelmann
Lon Chaney Jr.
as Lawrence Stewart Talbot
Martha O'Driscoll
as Miliza Morelle
Jane Adams
as Nina
Lionel Atwill
as Police Inspector Holtz
Glenn Strange
as The Frankenstein Monster
Ludwig Stössel
as Siegfried
Skelton Knaggs
as Steinmuhl
Joseph E. Bernard
as Brahms - Coroner (uncredited)
Dick Dickinson
as Villager (uncredited)
Harry Lamont
as Villager (uncredited)
