Review

The implications are the scary thoughts. In the introduction we learn that the film is based on real events at some US universities. Maybe some real experiments did occur? Just as space exploration was starting, it occurred to some people to ask... what would happen when the person is weightless - they would feel nothing, (on earth we at least feel the ground beneath us, and maybe the air moving) and then... what would happen if there was complete darkness and silence. What would happen to their mind? Only one way to find out, put a volunteer into that situation.

To replicate the weightlessness they use a water tank with the subject in a wet-suit and with breathing gear. They make it silent and dark... and then listen, and wait. What happens next is so scary.

There are added complications when the secret people get involved, a previous volunteer has been given a large sum of money by 'foreign' agents? Why? Maybe the Russians carried out similar experiments, or at least are thinking of it.

Dirk Bogarde is outstanding as Longman, (much much better than in African Queen), and the tragic Mary Ure as Mrs Longman is too. She gets to act the birth of a child and is so convincing. The "baby" she produces is either a real very very young actor (uncredited), or a very good prop, all wrinkles. John Clements is also outstanding at the Major.