Challenge of the Yukon began as a 15-minute serial, airing locally from 1938 until May 28, 1947. Shortly thereafter, the program acquired a sponsor, Quaker Oats, and the series, in a half-hour format, moved to the networks. The program aired on ABC from June 12, 1947, to December 30, 1949. It was then heard on The Mutual Broadcasting System from January 2, 1950, through the final broadcast on June 9, 1955. In September 1950, when the show moved to three broadcasts a week, the title was changed to Sergeant Preston of the Yukon.

Episodes ()

Episode numbers do not correlate with the podcast episode number but rather is a way for us to organize the episodes and give us a better sense of what episodes we are missing.

^* - Original air dates are accurate to the best of our ability and rely on external sources (including but not limited to) RadioGOLDINdex, OTRRpedia, On the Air: The Encyclopedia of Old-Time Radio by John Dunning and Old-Time Radio Researchers. Episode numbers is for organizational purposes only since they were made up by hobbyists and not actually from the networks.