The 78 half-hour episodes of the "kiddie" television adventure series "Sergeant Preston of the Yukon" were originally broadcast on CBS during the 1955 to 1958 broadcast seasons; and in syndication for many years after.
This was one of many transplants to early television from network radio. It was created by George W. Trendle and Fran Striker who also put together both the radio and television versions of "The Lone Ranger" and the radio version of "The Green Hornet".
At a time of look-alike westerns filmed on the back-lots of Hollywood, "Sergeant Preston of the Yukon" offered viewers the white landscape of Canada's Yukon Territory. It was actually filmed each winter in the mountains of Big Bear Lake, in southern California.
Like "The Lone Ranger", each week the story's setting and characters were described by the narrator in the opening credits: "Sergeant Preston of the Northwest Mounted Police with Yukon King, swiftest and strongest lead dog breaking the trail in the relentless pursuit of lawbreakers, in the wild days of the Yukon. Back to the days of the Gold Rush, as Sergeant Preston, with his wonder dog, Yukon King, meets the challenge of the Yukon".
The gold rush he is talking about occurred in the 1890's as Canada's desolate western frontier found itself suddenly occupied by a swarm of gold crazed miners, cutthroats, and tenderfeet. It was up to Sgt. Preston (his first name is never used) to track down thieves, murderers, and claim jumpers. The job left him no time for romance even though his Boston Blackie mustache, red uniform, puffed-out trousers, and DI hat must have driven the ladies crazy.
No doubt the education of baby boomers on NWMP lore was responsible for the successful introduction of "Dudley Do-right" to "Rocky and and His Friends/The Bullwinkle Show" (1959-1964).
Then again, what do I know? I'm only a child.