Treacherous sneak thief Milt Strang is saved from freezing by compassionate Yukon newcomer Eileen Mabry. Strang repays the young woman's kindness by attempting to steal her husband's valuable gold claim at gunpoint. Directed by: Charles D. Livingstone Writers:Robert C. Bennett, Fran Striker, George W. Trendle Dick Simmons as Sgt. Preston Yukon King as The Dog Rex as The Horse Lyn Thomas as Madge Dayton Jay Douglas as Tom Mabry Initially broadcast on February 2, 1956. Canadian Mountie Sgt. Preston patrols the wilds of the Yukon with his horse Rex and his faithful dog Yukon King, battling both the elements and criminals.