Adventures of Smilin' Jack: A Watery Grave on AllMovie

As the water from the underground is pushing the spikes upwards toward the trapped Smilin' Jack (Tom Brown), Axis spy Fraulein Von Teufel (Rose Hobart) is demanding the answer to the whereabouts of Mandon leader Mah Ling (Cyril Delevanti), the only one who knows the whereabouts of a hidden road leading from China to India. Luckily, Tommy (Edgar Barrier) and Captain Wing (Keye Luke) arrive just in the nick of time. Von Teufel makes her escape, only to reappear in her disguise of foreign correspondent at the press conference where Mah Ling is supposed to divulge the location of the secret passage. Armed with a poisoned dart to be fired from her ballpoint pen, the Fraulein is disappointed when Mah Ling demands a guarantee from the British High Commission in Hong Kong that the whereabouts of the road to India will only be used to further the allied war efforts. While Smilin' Jack is escorting Mah Ling to Hong Kong for the important counter signature, Fraulein Von Teufel plots to have the Mandon dignitary kidnapped before he can divulge his secret. Working with Hardigan (Stanley Blystone), a Hong Kong outfitter, Fraulein Von Teufel's plan succeeds and Mah Ling is soon on his way to a Japanese submarine entombed in a wooden box. Trapped in another box is Smilin' Jack, who discovered a clue leading him straight to Hardigan's on Water Street. This second box, however, is soon bobbing up and down in the Hong Kong harbor, the trapped Jack in grave danger of "A Watery Grave."