Across the rugged Indian Territory, rides a tall young man on a mission of mercy; his medical bag strapped on one hip and his six-shooter on the other. This is Dr. Sixgun. Grey Matson, M. D. was the gun-toting frontier doctor who roamed the length and breadth of the old Indian territory; friend and physician to white man and Indian alike, the symbol of justice and mercy in the lawless west of the 1870s. ” Dr. Sixgun is an American Western radio drama that aired on NBC from September 2, 1954 to October 13, 1955 as a 30-minute sustaining series. All known surviving episodes of Dr. Sixgun are from rebroadcasts from the Far Eastern Network in Japan of the Armed Forces Radio Service