King finds a hidden cave and leads Sgt Preston into it where they find pelts and over hear a conspiracy to burn down a warehouse. Original Air Date: July 15, 1943Host: Andrew RhynesShow: Challenge of the YukonPhone: (707) 98 OTRDW (6-8739) Stars:• Jay Michael (Sgt. Preston) Writer:• Fran Striker Producer:• George W. Trendle Director:• Fred…