Two spaceships land on a alien planet where aliens kill some of the crew and take over their bodies. There follows a battle of wits as the aliens try and take over all the astronaughts and the astronaughts try to repais their ship to leave the planet. This film was reputedly some of the inspiration behind the plot of Aliens. Whilst the effects are not particularly good, there is a good scene wher they explore a crashed spaceship that has skeletons of giant alien creatures. The film is said to have influenced many of films and directors.
3/5 
Barry Sullivan