A U.S. agent attempts to track down a spy ring working to destroy the Panama Canal.
as Maj. Phillip Waring
as Helen Lane
as Lia Maing
as Tommy Young
as Murdock
as Arlie Johnson
as Sun
as Loring
as Sam
as Pilot
as Jimmy
as Marlin (as William von Brincken)
as Lt. Everett
as Eli Maing
as Baird
as Khantow
as Clerk
as Captain Lacey
