皮佐法科尼的警局陷入一片混乱，四名涉嫌贩毒的特工被撤职，警局必须在年底度过难关，但偏偏有人挑战局势，卷入一起谋杀案...

　　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 Command