Synopsis
Sir Borotyn, a prominent Prague resident, is discovered murdered in his home, with all indications pointing to a vampire assault. The victim's friend, Baron Otto, and the physician who analyzes the body, are certain that the vampire is the mysterious Count Mora or his daughter. Receiving little help from the law, Professor Zelen, an expert in the occult, is called in to assist with their investigation.
Cast

Lionel Barrymore
Professor Zelin

Elizabeth Allan
Irena Borotyn

Bela Lugosi
Count Mora

Lionel Atwill
Inspector Neumann

Jean Hersholt
Baron Otto

Henry Wadsworth
Fedor Vincente

Donald Meek
Dr. Doskil

Jessie Ralph
Midwife

Ivan F. Simpson
Jan

Franklyn Ardell
Chauffeur

Leila Bennett
Maria

June Gittelson
Annie
Carroll Borland
Luna

Holmes Herbert
Sir Karell Borotyn

Michael Visaroff
Innkeeper

Egon Brecher
Coroner (uncredited)

Robert Greig
Fat Man (uncredited)

John George
Gypsy (uncredited)

Louise Emmons
Old Gypsy Woman (uncredited)

Eily Malyon
Guy Bellis

James Bradbury Jr.
Rosemary Glosz
Tiny Jones
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