Yukon King - Alaskan husky dog on the northwest adventure SERGEANT PRESTON OF THE YUKON/CBS/1955-58. According to the program's opening Yukon King was the "swiftest, and strongest lead dog, breaking the trail in the relentless pursuit of lawbreakers in the wild days of the Yukon." Yukon King originally debuted on the 1947 radio program CHALLENGE OF THE YUKON where Yukon King was raised by a wolf named Three Toes and later rescued from the attack of a wild lynx by Mountie officer Frank Preston (Richard Simmons), a Royal Northwest Mounted Policeman assigned to the Yukon Territory of the 1890s. "On, King! On, you huskies!" was a popular phrase used on the series. Yukon King (of Malamute breed) was trained by Beverly Allen.