William Sylvester

A young couple inherits an old mansion inhabited by small demon-like creatures who are determined to make the wife one of their own.

A secret vampire cult, which has its headquarters beneath the town cemetery, searches for victims for its human sacrifice rituals.

An evil hyponotist/ventriloquist plots to gain an heiress’ millions.

Greedy sailors capture a giant lizard off the coast of Ireland and sell it to a London circus. Then its mother shows up.