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.
Allan Lane
Dave King
Robert Strange
John Kettler
Robert Kellard
Tom Merritt, Jr.
Lita Conway
Linda Merritt
Herbert Rawlinson
Ross King
Harry Cording
Wade Garson
Bryant Washburn
Matt Crandall
Budd Buster
Vinegar Smith
Stanley Andrews
Tom Merritt Sr.
John Davidson
Shelton
John Dilson
Wall
Paul McVey
Zarnoff
Lucien Prival
Johnson
Norman Willis
Tarner
Tony Paton
LeCouteau
