"On, King! On, you huskies!," shouted Sergeant Preston of the Royal Northwest Mounted Police as he set out to enforce the law across the frozen Yukon at the turn of the century. His sled team, employed during the wintery months, was led by the smart malamute dog Yukon King, who was indispensible to Preston in his patrol of the vast Canadian northwest.
The series originated on radio (ABC, Mutual) in 1947 as Challenge Of The Yukon and continued on radio until 1955. Many of the TV episodes were based on radio episodes. The theme was "Donna Diana Overture," by Emil Von Reznicek.