When Submarine D-1 is disabled deep below the surface, a newly-designed rescue chamber is the only thing that can save the men inside. Filmed in 1937, this suspenseful thriller is eerily prescient of the 1939 USS Squalus incident, which is also covered on this DVD with the inclusion of the documentary short, The Squalus Story. B&W, 1 hr. 47 min. total runtime.