Routine tests on a traffic accident victim lead to shocking discoveries when the man's blood is found to be unidentifiable and x-rays reveal a disc embedded in his brain. His fabulous tale of being an escaped prisoner from an alien spaceship takes a turn for the sinister when the hospital staff realise that they're under a state of siege...
Invasion is a 1966 low-budget British science fiction film, directed by Alan Bridges and starring Edward Judd and Yoko Tani. It was written by Roger Marshall, based on a story by Robert Holmes, and produced by Jack Greenwood.