Canadian Mounties vs. Atomic Invaders

Canadian Mounties vs Atomic Invaders (1953) is a Republic Movie serial starring Bill Henry and both produced and directed by Franklin Adreon. It was the sixty-second serial (of sixty-six) produced by Republic. Despite the title, this is not a science fiction serial. The plot is a northern cold war adventure involving secret missile bases and a planned invasion of the United States by a foreign power that plans to establish secret missile silos in Canada.

Plot
A foreign power, which is represented by their agent Marlof, attempts to set up secret missile bases in Canada to target the United States for their planned summer invasion. Meanwhile, acting on intelligence following the smashing of a spy ring in Montreal, Royal Canadian Mounted Police (RCMP) officers Don Roberts and Kay Conway go undercover in a settling party headed for the Yukon. Marlof also has agents, Beck and Reed, in the party en route to the site of the planned missile bases. Their attempts to disrupt the party only call the attention of the Mounties to the larger plot who, once the settlers finally reach their goal, continue to pursue the troublemakers, uncover their plot against the free world, unmask Marlof and bring them to justice.