Taking refuge from a rainstorm in a deserted farmhouse, young married couple Joe and Loretta Martin (Edward Norris and Rochelle Hudson) soon discover to their horror that the house is being used as a hideout for a gang of kidnappers. Gang leader Tobey (Cesar Romero), a comparatively reasonable sort, elects not to kill the couple because they have an ailing baby with them. But Tobey's psychotic henchman Pitch (Bruce Cabot) is not quite so sentimental, and awaits the opportunity to knock off all three "intruders." When the G-Men, tipped off by the serial numbers on some ransom money, manage to track down the crooks, Tobey is killed, leaving Loretta and her baby at the mercy of Pitch -- at least until she picks up a machine gun and mows him down! As brutal as it was possible to get under the newly strengthened Production Code, Show Them No Mercy (inspired by the real-life Weyerhauser kidnapping case) is an excellent entry in the "FBI cycle" of the mid-1930s. The film was remade in a western setting as Rawhide (1951).
by Hal Erickson synopsis