Watch FMovies. In this remake of Gene Autry's 1942 "Call of the Canyon", Rex Allen, the newly-elected head of the cattleman's association, is driving the combined herds of the ranchers to the nearest railhead when he runs into trouble. Singing cowboy Rex Allen stars as a newly appointed leader of a cattleman's association who finds himself battling a greedy meat-packer (Robert Karnes) and his father (Robert Emmett Keane) for fair passage through the hills of Oklahoma.