

19/09/1940
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
as Dave King

Robert Strange
as John Kettler

Robert Kellard
as Tom Merritt, Jr.

Lita Conway
as Linda Merritt

Herbert Rawlinson
as Ross King

Harry Cording
as Wade Garson

Bryant Washburn
as Matt Crandall

Budd Buster
as Vinegar Smith

Stanley Andrews
as Tom Merritt Sr.

John Davidson
as Shelton

John Dilson
as Wall

Paul McVey
as Zarnoff

Lucien Prival
as Johnson

Norman Willis
as Tarner

Tony Paton
as LeCouteau

John Bagni
as Higgins, Cabin Henchman

Earle D. Bunn
as Joe - Smelter Truck Driver

Tommy Coats
as Henchman Mike

George DeNormand
as Fake Inspector Kent

Curley Dresden
as Kelly - Miner

Douglas Evans
as Sergeant - Wireless Operator

James Fawcett
as Smelter Heavy #2

George Ford
as Paralytic #3

Bud Geary
as Klondike

Alan Gregg
as Mills

Sam Harris
as Major Harold Bolton

Bob Jamison
as Pete

William Kellogg
as Const. MacCloud

Walter Lowe
as Paralytic #2

Ted Mapes
as Blake - Gang Pilot

Dave Marks
as Knife Heavy

George Plues
as Train Brakeman

Wallace Reid Jr.
as Constable Doyle

Loren Riebe
as Fake Inspector Dinwoodie

Dick Simmons
as Const. Carter

Cy Slocum
as Sanitarium Heavy

William Stahl
as Corporal Bob Hastings

Denny Sullivan
as Paralytic #1

Al Taylor
as Henchman Red

Duke Taylor
as Smelter Heavy #1

Ken Terrell
as Henchman Al

Charles Thomas
as Henchman Bayliss

Richard Travis
as Const. Hallett

Dale Van Sickel
as Gang Radioman

Frank Wayne
as Brant - Speedboat Driver-Thug

Robert Wayne
as Lieutenant

Bill Wilkus
as Bill - Sanitarium Heavy

Al Thompson
as Paralytic #4
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