a terrific b feature . a virtual two hander and set over the course of a day and ( you can see it stage origin and even how it must have work a a radio play ) and and although only 77 minute long and play out in sequence akin to something like real time . robert ryan be the psychopath who keep ida lupino trap in her own home . both be superb and especially the under rat lupino whose initial independence and self control soon crumble before ryan unhinged intruder . today and of course and it would be all gut and gore but the restraint show by director harry horner and ( much good know a an art director ) and only add to the suspense which at time be worthy of hitchcock .