Executive producer/star William Boyd obviously went for something different this time but Unexpected Guest proves to be less than thrilling as a whodunit and downright irrelevant as a Western. The company did film a few exteriors in Lone Pine, CA, a favorite haunt of the series, but most of the action (and the term is used loosely) takes place in a ranch house set. Happily, someone had the notion of hiring Una O'Connor, late of the Universal horror films, to play the perpetually nervous housekeeper. The delightful scene-stealer is in full throttle for most of the film, her voice quivering with either fear or hopelessness, her hands constantly wringing, and her bird-like countenance expressing alternately mounting worry and sheer terror. Too bad that scenarist Ande Lamb didn't offer Miss O'Connor something more substantial to do or say.