Season 3 follows the fortunes of a young U-boat crew as they engage in the Battle of the Atlantic, are hunted down by an obsessed Royal Navy Commander (Ray Stevenson) and are sent on a dangerous mission to the Southern Hemisphere. Together they form strong personal alliances under the command of Robert Ehrenberg (Franz Dinda). 　　And yet Ehrenberg's thoughts remain in Kiel, where ..(艺术本来是弥补人生和自然的缺陷的，一切美的事物，都需要我们自己去发现和经营。)