An FBI agent goes undercover to investigate the sabotage of American cargo ships.
Jim Davis
as Joseph Cummins
Ian Keith
as FBI Director Sinclair
George Travell
as Rucca
Frederick Worlock
as Hugo Stregel
Stanley Andrews
as Mitchell (uncredited)
Hugh Beaumont
as FBI Chemist (uncredited)
Ralph Dunn
as Vic, Stregel's Thug (uncredited)
Byron Foulger
as Pelly, Stregel's Henchman (uncredited)
Ian Wolfe
as Gruning, Stregel's Henchman (uncredited)
