Synopsis: The clipper carrying Jack, Janet, Mah Ling, and Fraulein Von Teufel and her Axis spies plunges into the sea. The Japanese submarine crew enters the still floating aircraft, demanding that Mah Ling reveal the location of the secret passage from China to India or else. Jack and his friend manage to overpower the enemy and take over the submarine. In order to remain anonymous, Fraulein Von Teufel, still in the guise of foreign correspondent Gertrude Muller, kills one of her female operatives with a posioned dart, letting Jack believe that the dead woman was Von Teufel.
Director: Lewis D. Collins, Ray Taylor
Starring: Tom Brown, Rose Hobart, Edgar Barrier