A spaceship is sent to Mars after an alien distress signal is picked up. They find one survivor, but when a crew member is found drained of blood it's evident they have rescued a bloodsucking monster. Uses footage from Encounter in Space (1963).
Florence Marly
as Alien Queen
Basil Rathbone
as Dr. Farraday
John Saxon
as Allan Brenner
Judi Meredith
as Laura James
Dennis Hopper
as Paul Grant
Robert Boon
as Anders Brockman
Don Eitner
as Tony Barrata
Virgil Frye
as Control Panel
Forrest J. Ackerman
as Farraday's Aide
Gary Crutcher
as Spaceship Crew Member
