Mario Bava

Decades after being executed for witchcraft, vengeful Princess Asa Vajda and her fiendish servant are resurrected and begin a bloody campaign to possess the body of Asa Vajda's beautiful look-alike descendant Princess Katia.

After landing on a mysterious planet, a team of astronauts begin to turn on each other, swayed by the uncertain influence of the planet and its strange inhabitants.

The murder of a wealthy countess triggers a chain reaction of brutal killings in the surrounding bay area, as several unscrupulous characters try to seize her large estate.