10 Episodes · Premiered May 14, 2022 · Ended May 14, 2022
Three thrilling storylines intertwine in this season. Chief engineer Ehrenberg and his crew have to fulfill an impossible mission. Forster and Hoffmann find themselves working together in Lisbon. Hannie Lessing struggles and subsequently plays with fire.
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.
