Jim Ackland, who suffers from a head injury sustained in a bus crash, is the chief suspect in a murder hunt, when a girl that he has just met is found dead on the local common, and he has no alibi for the time she was killed.
The October Man is a 1947 mystery film/film noir starring John Mills and Joan Greenwood, written by novelist Eric Ambler, who also produced. A man is suspected of murder, and the lingering effects of a brain injury he sustained in an earlier accident, as well as an intensive police investigation, make him begin to doubt whether he is innocent.