The film chronicles an expedition to study and retrieve parts of the USS Monitor, the famous Civil War ironclad, which sank off North Carolina only months after its famous battle with the CSS Virginia.

The film follows a six-year odyssey by a group of divers to identify a mysterious U-boat they discovered in 1991 off the coast of New Jersey

The program documents a series of spectacular escape attempts made at Colditz Castle, the Nazi's most impregnable prison.