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"Foreign Spies Exposed! Canal Defense Saved!"
A U.S. agent attempts to track down a spy ring working to destroy the Panama Canal.
18 Cast Members
Leon Ames
Maj. Phillip Waring
Charlotte Wynters
Helen Lane
Adrienne Ames
Lia Maing
Richard Loo
Tommy Young
Weldon Heyburn
Murdock
Abner Biberman
Arlie Johnson
Philip Ahn
Sun
Don 'Red' Barry
Loring
Frank Darien
Sam
Gerald Mohr
Pilot
Sidney Miller
Jimmy
Wilhelm von Brincken
Marlin (as William von Brincken)
Hugh McArthur
Lt. Everett
J. Scott Smart
Eli Maing
Paul McVey
Baird
Philson Ahn
Khantow
Harry C. Bradley
Clerk
Lew Kelly
Captain Lacey
