Dana Andrews as an American psychologist, newly-arrived in England to attend a convention, who ends up investigating the death of a colleague which may stem from witchcraft. Delectably sinister and crafty UK occult entry from director Jacques Tourneur, who creates a shimmering and eerie mood from Hal Chester and Charles Bennett's screenplay. The two writers, adapting Montague R. James' book "Casting the Runes", reportedly quarreled over the occult elements in the script--with Bennett's attempts at a more subtle approach going unrealized (arguably, we get too many close-ups of the titular demon, but he's a scene-stealer nevertheless!). Tourneur weaves this Hitchcockian tale with a great deal of hypnotic style, and gets fine performances from Peggy Cummins as the daughter of the deceased as well as the always-reliable Andrews (one might say the actor seems a bit stolid here but, since his character is a born skeptic, he should look tense and uncomfortable). Niall MacGinnis is nothing short of amazing as Dr. Julian Karswell, sort of a mama's boy/devil cult leader and one of the very best villains in 1950s cinema. Supporting performances are all first-rate, the picture looks fantastic in chilly black-and-white as photographed by Ted Scaife, and the satisfying finale leaves one both smiling and hungry for more. Initially released in the US as "Curse of the Demon", missing 15 minutes from its original running time of 95 minutes. ***1/2 from ****