Remember that scientist that was trying to perfect a matter transportation machine but got fused with a fly when one of the little critters got into the transporter with him? Well, this story is about three of his descendents (a son, Henri Delambre, played by Brian Donlevy and two grandsons). Seems the son wants to continue and perfect the machine while his two sons want to get out of the scientist business and live “normal” lives. The oldest son, Martin, decides to take a wife (who just happens to have escaped from a mental hospital after her parents died). Martin’s father is not happy with this intrusion but finally gives in because he understands him son’s needs. They all try to be a happy family until humans used in botched experiments are discovered by the new bride and the police nearly discover the lab while looking for Martin’s wife. Everyone tries to get out of there via the transporter but things just don’t go according to plan …

The US military is running a test for a special type of radio transmitter, to be used to communicate with submarines, in a deep system of underground caves in Central America. When the signal from one of the transmitters suddenly disappears, a team of soldiers led by Major Elbert Stevens (Bottoms) and cave specialists led by Rupert ‘Wolf’ Wolfsen (Powell) including scientist Leslie Peterson (Blount) are sent in to find out what happened. Exploring deep underground, they stumble upon a tribe of albino cave-dwellers who have apparently been isolated from the rest of the world for thousands of years. The cave-dwellers are hurt by radio frequencies and are able to see in infra-red frequencies, tracking the explorers by their body heat.

A gang of young people call themselves the Living Dead. They terrorize the population from their small town. After an agreement with the devil, if they kill themselves firmly believing in it, they will survive and gain eternal life. Following their leader, they commit suicide one after the other, but things don’t necessarily turn out as expected…

Honeymooning in Bavaria, the young couple become stranded and are forced to stay the night in the area. Doctor Ravna, owner of the impressive chateau that sits imposingly above the village, invites them to dinner that evening. Their association with Ravna and his charming, beautiful family is to prove disastrous as they become unwittingly embroiled with this family of vampires who seek to initiate them into their diabolical creed.