Richard Widmark is on quite good form here, as the veteran naval officer hired by a group of scientists to take a ramshackle old submarine from Japan to investigate some mysterious goings-on on an island under Chinese control, and where they think atomic experiments may be taking place. Setting sail with "Prof. Montel" (Victor Francen) and his assistant "Denise" (Bella Darvi) it soon becomes clear that their scarcely functioning vessel is not going to be the captain's only concern as they have to dodge enemy patrols and reach their target. I like submarine films, and this one isn't bad. Samuel... read the rest.