Summary: Residents of a radio telescope laboratory are kidknapped when they answer a mysterious signal from outer space. They are taken to a satellite inhabited only by robots, where they are presented with a series of intelligence tests. Since this is a mystery as well as a sci-fi movie I will only say that the rest of the plot deals with their attempt to find out why they've been kidnapped, and how they will get back to earth. (imdb)

Genre: Sci-fi

Country: UK

Directed By: Montgomery Tully

Written By: John Brunner, Murray Leinster

Starring: Patricia Hayes, Charles Hawtrey, Max Adrian, Simon Oates, Frank Barry, Leonard Cracknell, Frank Forsyth, Robert Jewell, André Maranne, Zena Marshall, Stanley Meadows, Richard Carpenter

More information at the Internet Movie Database