Saturday Is Old Radio Day: Challenge of the Yukon - "The Perfect Crime (1949)"

Long-running radio program that became "Sergeant Preston of the Yukon" and featured the great sled dog "Yukon King" who pursued criminals with relentless spirit of the Mounties who "always get their man" -

The program was an adventure series about Sergeant Frank Preston of the North-West

Mounted Police and his lead sled dog, Yukon King, as they fought evildoers in the Northern wilderness during the Gold Rush of the 1890s.
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Preston's side-kick and ally (and arguably the true star of the show), was the brave Alaskan husky, Yukon King. Yukon King had a keen instinct for sensing criminals, and was equally valuable dealing with wild animals, once saving a small child from a wolverine.

Started as a 15 minute serial but later expanded into 1/2 hour shows. Here's one of the longer shows: