An inexperienced U-boat crew has to survive a secret mission and a young German woman is torn between loyalty for her home country and the French resistance in the WWII drama.
U-boat Captain Ulrich Wrangel and his men are caught in battle with a US Frigate. Meanwhile, in occupied France, young Captain Klaus Hoffmann worries that he won't be able to live up to his famous father's reputation.
Aboard U-612, the men are adjusting to their new lives. Meanwhile in La Rochelle, Simone struggles to piece together what happened the previous evening.
As U-612 completes the first part of their mission, the crew is reeling from a tragic death. Meanwhile on land, Gluck organises a parade for the return of Captain Becker and his men.
Following the explosion at La Rochelle, the Mayor is ordered to make some harsh decisions under the watchful eye of Gluck and Forster.
The crew welcomes the departure of Greenwood, but their new guest comes as a surprise. Meanwhile, Carla and Simone's relationship continues to develop.
Trapped below the angry, ominous rumble of a destroyer, the outlook is bleak for the crew of U-612. The inexperienced but eager young men wanted a battle, but they may have taken on more than they bargained for.
Details of what happened to the U-612 reach the shore and Forster has the task of breaking the news to Simone.
With news of Gluck's kidnapping reaching La Rochelle, Forster is on the warpath and everyone is in the firing line, including Simone.
War is taking its toll on U-boat commander Johannes von Reinhartz, hero of the Kriegsmarine. Could a new mission offer a way out?
When Johannes' plan emerges, Gluck knows only one man is capable of stopping him. Margot needs help to get the Goldblatts out.
Tensions build beneath the ocean as Wrangel continues his pursuit of U-822. In New York, Sam takes drastic measures.
An attempt to get his crew on side has serious consequences for Johannes. Margot finds a vital ally as Forster reaches St. Remy.
Keen to impress his superiors, Forster cracks down on Anatole's wayward behaviour. Wrangel finally has his arch rival in sight.
Johannes and Wrangel try to bring their crews into line. Despite his growing love for Cassandra, Hoffmann seeks an escape route.
Wrangel catches up with Johannes, leading to a dramatic showdown out in the Atlantic. Hoffmann shows up at Cassandra's place.
Hoffmann struggles to hang on as his chance to escape heads toward US shores. Margot pushes on with her plans.
Spring 1943: L.I. Ehrenberg prepares submarines for use in Kiel. Minors are recruited as crews. Wilhelm Hoffmann attends a reception at the request of his son-in-law.
As Forster investigates the Dorfmann murder in Lisbon, the U-949's new sailors get into a fight in Kiel and Swinburne attends his son's funeral.
The U-949 is endangered by Commander Buchner's orders as Forster finds a lead in a casino and makes the acquaintance of the German Bettina Gruber.
Swinburne sets sail with a technologically upgraded ship, Ehrenberg makes a difficult decision and Forster tries to get a traitor out of the country.
After finding out the truth about his son, Wilhelm Hoffmann fights with Hannie. Ehrenberg has to say goodbye to Greta and Forster's plan goes haywire.
Swinburne's destroyer sinks two U-boats before going after U-949. Forster observes a secret meeting between Consul Gruber and the American Gardiner.
U-949 meets a Japanese boat to take on heavy cargo - gold. Wilhelm Hoffmann is invited to Lisbon and Forster reveals all to Klaus Hoffmann.
After a bomb explodes, Forster and Klaus Hoffmann are forced to hide. Wilhelm Hoffmann arrives in Lisbon, as U-949 heads towards her new destination.
As Klaus Hoffmann pursues German agent Weiss, U-949 comes under heavy fire from Swinburne's destroyers, and Commander Buchner tries a risky manoeuvre.
As the U-949 reaches Portugal, Ehrenberg returns to Kiel, and Klaus Hoffmann and Forster turn to blackmail.
August 1943: Franz Buchner is in action with the U-949. An informer on board divides his crew. The Hoffmann family gathers in Berlin to attend the premiere of a film about Klaus.
Robert Ehrenberg supports the resistance within the Navy and gives Klaus Hoffmann a clue. Bobby Schulz is on his trail. U-949 comes under fire in the Strait of Gibraltar.
Commander Buchner reaches the coast of Naples. Klaus Hoffmann is also on his way there. His sister Hannie meets twelve-year-old Hertha.
Klaus Hoffmann commands the ailing U-330 on a secret dive, but not all the men trust him. Hannie wants to take Hertha in. Staff officer Heinrich Gluck has to make a decision.
After a risky maneuver, the U-330 appears next to a US Navy ship. SS man Koch uncovers the identity of the spy "Fidelio". Hannie gets on the trail of the Lebensborn organization.
Schulz kills with his own hand for the second time. Klaus Hoffmann has to realize that the Allied invasion is already underway. In Naples, a man with a murder mission is waiting.
Complete episode guide for Das Boot with detailed information about every season and episode including air dates, summaries, ratings, and streaming availability in United States.
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