Challenge of the Yukon

Sergeant Preston and his dog King met more trappers and prospectors than newspapermen, but there were at least three exceptions, according to plot summaries from J.David Goldin’s

I am searching for more in the 630 episodes the Old Time Radio Researchers group has uploaded to the Internet Archive,

Faith in a Mountie — an editor is kidnapped while planning an exposé.  Unfortunately that Internet Archive collection of the radio series has another episode mistitled with the name of this one.

White Water — The San Francisco Chronicle sends reporters to the Yukon, but a murderer waits…

The Minister’s Missing Money — the son of a newspaper publisher accidentally switches suitcases with a minister.