The Vampire Bat (1933)

Dwight Frye, Melvyn Douglas, Lionel Atwill, Fay Wray

When the villagers of Klineschloss start dying of blood loss, the town fathers suspect a resurgence of vampirism. While police inspector Karl remains skeptical, scientist Dr. von Niemann cares for the vampire's victims one by one, and suspicion falls on simple-minded Herman Gleib because of his fond