After a series of murders, a man finds out that his mother was bitten by a vampire bat during her pregnancy, and he believes that he may be the vampire committing the murders.
| Actor | Role |
|---|---|
 Ralph MorganPaul Kristan | Paul Kristan |
 Pedro de CordobaAnders Bizet | Anders Bizet |
 Maxine DoyleMarguerite Mane | Marguerite Mane |
 Russell GleasonDavid | David |
 Mischa AuerZan | Zan |
 Lucy BeaumontMother Molly | Mother Molly |
 Carl StockdaleJohn Mane | John Mane |
 Barbara BedfordMartha Kristan | Martha Kristan |
 Robert FrazerDr. Duprez | Dr. Duprez |
 Ferdinand Schumann-HeinkFranz Kristan | Franz Kristan |
 Marilyn KnowldenMaria | Maria |