Hoffmann struggles to hang on as his chance to escape heads toward US shores. Margot pushes on with her plans.

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.

Ulrich looks to the past for answers and dredges up disturbing family secrets. Armed with new tools, Jonas probes the cave’s murky depths.