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.

• DirectorJohn English
• Release19 September 1940
• Genre
  Western / Action
• Duration3h 31m
• Budget?
• Revenue?
• Rate
  

  6.0
  1 reviews
• Productions

  Republic Pictures