People start getting murdered, and the coroner is convinced the killings are the workings of a reclusive odd baron who died decades ago. The baron's great grandson arrives to stay at his ancestor's castle as the strange murders continue.

Five beautiful showgirls are trapped by a storm and find refuge in a creepy old castle. The owner of the castle, a strange nobleman, has a secret laboratory in the basement and has his own plans for the girls.

A small rural Spanish village of the present is haunted by vampires. Dr.Dora Maeterlick is called to a nearby castle to cure the father of Baron Carl von Rysselbert who suffers from a strange blood disease. Erika, assistant to Doctor, falls in love with Carl. But Carl is a vampire and pretty soon he makes Erika his vampire bride. From now on Dr.Maeterlick plunges into a nightmarish whirl of dark happenings...

Count Cagliostro, whose family has tried for generations to rid the world of vampires, instructs his daughter and her fiance to protect several valuable documents.

Graverobbers stumble upon the tomb of a vampire, who turns them into zombies to do his bidding, which is to stalk and capture beautiful women.

Second part of the Valdemar saga. Ana and Eduardo are sent to assist in the investigation of the disappearance of Luisa. In the middle of the road they find Luisa escaping. At the end the three are kidnapped. A gruesome fate awaits.

The tenants of the Sunset Towers must compete to learn who killed an eccentric millionaire and win a $20 million inheritance.

The demented archaeologist Dr. Andrew Forbes (George Zucco) discovers a living, breathing serpent creature known to the Aztecs as Quetzalcoatl (the Killer Bird God) and accidentally kills his wife by giving her one of the beast's feathers, causing the creature to track her down and slaughter her. Now Dr. Forbes uses this twisted knowledge to extract revenge upon his enemies by placing one of the serpent's feathers on his intended victim and letting the beast loose to wreak havoc.

A secretive widower hires a governess for his children, a willful boy and impressionable girl. Strange occurrences and the governess's curiosity lead her to unlock the secrets of the mysterious and uninhabited brownstone next door.