The hunter becomes the hunted, an officer of the Royal Mounted, fleeing, fighting for his life. Guided to a secret valley in the frozen North by a hot-blooded French-Canadian beauty, with a secret of her own...

Western star Charles Starrett makes one of his periodic forays into the Great White North in Columbia's Royal Mounted Patrol. When villainous lumberman Frenchy Duvalle refuses to limit his wood-chopping activities, he inadvertently touches off a forest fire. Trapped in the middle of the conflagration, Frenchy's only hope for rescue is mountie Tom Jeffries, presently scouring the countryside in his scout plane. Jeffries' reasons for bringing Frenchy out safely are twofold: he must deliver the renegade lumberjack to the authorities, and he happens to be in love with Frenchy's sister Betty.

Assigned to catch a gang of outlaws, officers Bruce Kenton and Paddy Halloran rescue Helen Morgan when her wagon is attacked by the very same gang. Through a ruse, Kenton manages to infiltrate the gang, which is holed up in the lawless community of Caribou Flats. While in the employ of villainous trading post operator Jack Blake, Kenton discovers that Blake is not only the leader of the gang but also the man who murdered Helen's brother.

Royal Canadian Mountie Dudley Do-right is busy keeping the peace in his small mountain town when his old rival, Snidely Whiplash, comes up with a plot to buy all the property in town, then start a phony gold rush by seeding the river with gold nuggets.

Crooks discover a Genghis Khan treasure ship on the Canada-Alaska border but the treasure is hidden somewhere on land. In their efforts to find the hidden treasure they resort to murder and sabotage to stop the construction of the Alcan highway which will bring homesteaders to the area. Sergeant Royal of the Royal Canadian Mounted Police battles through 12 episodes to find the crooks and to learn the identity of their mysterious leader known only as 'The Boss'.

In the Canadian mountains, a trapper goes on the run accused of a crime and is pursued by a rugged and determined lawman of the Royal North-West Mounted Police.

Klondike the German Shepherd dog works with the Northwest Canadian Mounted Police to track down smugglers.

Texas Ranger Dusty Rivers ("Isn't that a contradiction in terms?", another character asks him) travels to Canada in the 1880s in search of Jacques Corbeau, who is wanted for murder. He wanders into the midst of the Riel Rebellion, in which Métis (people of French and Native heritage) and Natives want a separate nation. Dusty falls for nurse April Logan, who is also loved by Mountie Jim Brett. April's brother is involved with Courbeau's daughter Louvette, which leads to trouble during the battles between the rebels and the Mounties. Through it all Dusty is determined to bring Corbeau back to Texas (and April, too, if he can manage it.)

Ann Fenwick is a witness to a bank robbery in the U.S. and the bandits, led by Trigger and Leon capture her and when she disappears, a warrant is issued for her arrest as a material witness. The bank robbers flee across the border into Canada where they steal a trailer in which they lock Ann and the loot. The hitch breaks and the trailer plunges into a lake. Sergeant Renfrew and Constable Kelly, of the Canadian Mounties, rescue Ann and she tells them she is a hitch-hiking tourist and gives a false name. Renfrew sends Kelly for aid, Ann escapes and Kelly returns with the news that she is wanted. The leader of the gang, Cardigan, sends the gang back for Ann and the loot, which Ann has hidden in a trappers cabin, just before Trigger recaptures her. Renfrew goes to her rescue, but is also captured. But reliable Constable Kelly is somewhere in the woods.

The Canadians have discovered a valuable substance called Compound X, which can cure infantile paralysis. When a country at war with Canada learns that Compound X also contains magnetic properties that could aid them in their warfare against the British, they send agents to infiltrate Canada and steal a large quantity of the substance. It's up to Sgt. King (Allan Lane) and his Mounties to track down the agents and put an end to their scheme.

An incognito opera singer falls for a policeman who has been assigned to track down her fugitive brother.

Sergeant Ken Strange, of the Canadian Mounted Police, and his dog, King, are on the trial of the murderer.