Queen of Blood

Queen of Blood is a 1966 color science fictionhorror film, produced by George Edwards and Samuel Z. Arkoff, directed by Curtis Harrington, and starring John Saxon, Basil Rathbone, Dennis Hopper, and Judi Meredith. The film was released by American International Pictures as part of a double bill with the AIP feature Blood Bath. Director Harrington crafted this Bmovie using footage from the Soviet feature films Mechte Navstrechu and Nebo Zovyot.

The Institute launches a rescue mission aboard the spaceship Oceano, which includes Laura and astronauts Anders Brockman and Paul Grant. Oceano travels through a sunburst, suffering some damage, completing the journey to Mars and locating the downed alien craft. Anders and Paul investigate and discover a single dead alien aboard. Faraday deduces that the surviving crew may have been rescued, so an observation satellite will be needed to locate the alien rescue ship. Lauras fianc Allan and fellow astronaut Tony volunteer. They travel on the spaceship Meteor to Phobos, one of the two moons of Mars, where they launch the observation satellite. Tony finds an alien spaceship on Phobos. He and Allan are able to enter, finding an unconscious but stillliving female alien. As their rescue ship only holds two, one of them must stay behind, so they toss a coin and Tony stays.Allan and the female alien arrive on Oceano, joining Laura, Paul and Anders. The alien regains consciousness and smiles at the three men, but not Laura. The alien refuses to eat all food offered and will not let Anders take a blood sample. That night, as Paul is guarding the alien, she attacks and kills him, draining his blood after first hypnotizing him. The surviving astronauts decide to keep her alive by feeding her blood from the ships plasma supply. When this supply runs out, she kills Anders and feeds on him, leaving Laura and Allan the only humans aboard. ........

Source: Wikipedia