The Terrornauts is a 1967 British science fiction film directed by Montgomery Tully and starring Simon Oates and Zena Marshall. It was produced by Amicus Productions and based on the 1960 novel The Wailing Asteroid by Murray Leinster, adapted for screen by John Brunner. Space scientists foil an alien invasion of Earth.

Plot

Project Star Talk is based at a UK radio telescope site; its mission is to listen for radio signals from other intelligences. Dr Joe Burke leads the project, assisted by his small team as electronics expert Ben Keller and office manager Sandy Lund. Due to their lack of success, they are given ninety days to report positive results. While waiting for a response, Burke tells of his uncle's discovery at a French archaeological dig of a cube that gave him strange dreams as a boy, inspiring him to become an astronomer. During this period Joshua Yellowlees, an accountant, arrives to inspect the project's books.