Sins of the Father - Challenge of the Yukon

Challenge of the Yukon is an American radio adventure series that began on Detroit's WXYZ and is an example of a Northern genre story. The series was first heard on January 3, 1939 (previously incorrectly stated as February 3, 1938). The title changed from Challenge of the Yukon to Sergeant Preston of the Yukon in September 1950, and remained under that name through the end of the series and into television.

Following the success of The Lone Ranger and The Green Hornet on Detroit's WXYZ (now WXYT), the station owner, George W. Trendle, asked for a similar adventure show with a dog as the hero. According to WXYZ staffer Dick Osgood, in his history of the station, Trendle insisted that it not be "a dog like Lassie because... this must be an action story. It had to be a working dog." Writer Tom Dougall, who had been influenced by the poems of Robert W. Service, naturally chose a Husky. The dog was originally called Mogo, but after criticism by Trendle, Dougall re-christened the canine King. Dougall likewise created Sgt. Preston and the French-Canadian guide. Fran Striker, who also wrote for The Lone Ranger, contributed show scripts.

However, Trendle's criticism of Dougall may have had another reason behind it. Shortly before the two Trendle series aired (Lone Ranger and Challenge of the Yukon), popular author Zane Grey had a book in circulation (The Lone Star Ranger) about a Texas Ranger like the Lone Ranger and a comic book series in circulation (King of the Royal Mounted) about the adventures of Sgt. King, a Royal Canadian Mounted Policeman like Sgt. Preston. From 1922 a series of novels by Laurie York Erskine featuring Renfrew of the Royal Mounted warranted enough popularity to begin a radio series of the same title in 1936 and a film series beginning in 1937; the latter featuring a canine sidekick.

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. (Wikipedia_