A scientist’s thoughts materialise as an army of invisible brain-shaped monsters (complete with spinal-cord tails) who terrorise an American military base in Canada following atomic experiments in this nightmarish chiller, directed by Arthur Crabtree.
This outstanding Quatermass-style sci-fi/horror hybrid is a special effects bonanza and a high-water mark in British genre filmmaking, despite the pseudo-American trappings and fading Hollywood actor Marshall Thompson taking centre stage.
Major Jeff Cummings
Marshall Thompson Captain Chester
Terence Kilburn Professor Walgate
Kynaston Reeves Colonel Butler
Stanley Maxted Sergeant Kasper
Michael Balfour Barbara Griselle
Kim Parker Dr Warren
Gil Winfield Mayor Hawkins
James Dyrenforth Constable Gibbons
Robert MacKenzie Dr Bradley
Peter Madden
Major Jeff Cummings
