Desc: Riders of the Dark: Directed by Nick Grinde. With Tim McCoy, Dorothy Dwan, Rex Lease, Roy D'Arcy. Lieutenant Crane (Tim McCoy)of the U. S. Cavalry is assigned to clean up and bring law and order to a frontier town and area ruled by a gang of cattle rustlers. His only help is Molly Graham (Dorothy Dwan) and her brother, Jim (Rex Lease), who run the town newspaper after their father was murdered by the outlaws.