Katja and Dirk arrive in time to stop Mr. Petri's madness and bring him in to the station. Meanwhile, Lothar finds out the truth about their supervisor.

While Dirk bonds with the young runaway, Katja figures out what actually happened at the Harms company.

Petri's colleague is arrested, and Petri and his wife make amends. It's time for Julius, the young runaway, to say goodbye to Harry and go home – but Dirk has one last surprise.

Katja and Dirk confront Henning regarding Rosa’s accusation. Meanwhile, Lothar tries to follow up on his internal assignment without his colleagues noticing – but then Nicki catches him in the act.

Dirk, Harry, and Katja speculate about why Rosa would make up such an extreme story about Henning. Henning himself wants to confront Rosa, but Harry stops him; meanwhile, Dirk and Katja pay Rosa’s absentee father a visit on his ship.

All's well that ends well! Rosa admits to having made up everything in order to get her father's attention, which means Henning can be reinstated; meanwhile, Lothar finally cracks his case.

The young suspect is spotted riding a woman's bike around town, so the patrol team sets out in pursuit, as do the homicide investigators. It's clear that the two teams really don't get along.

Mr. Krabbe gives his boss a teddy bear, and Dirk gives Paul some friendly advice on letting go...

Part two of "Der gute Bulle" ("The Good Cop") begins with Dirk Matthies reflecting on everything that has happened so far. Dirk tries to get in touch with Elias, while Nina and Daniel decide to question Mirko.

Nina and her colleague Daniel ask Mirko whether he has contacted the criminal investigation department as promised. Harry Möller tells her colleague about the date she went on the previous evening, and Hannes overhears his chief officer, Frau Küppers, with whom he is secretly in love, talking about her dreams...

Martin's boys get into a fight, which threatens to derail the whole expedition to climb Gran Paradiso. Will Lisa manage to calm everyone down?

Having been upset by Wolf again, Mark is on the verge of turning back. But Lisa talks to him, and her words seem to have an effect.

The summit is within reach, but there are still another two nights to go. The group will also have to negotiate a crevasse...

As they climb the Gran Paradiso, tempers fray, the risk increases, and one very frightening incident occurs...

The group has reached the hut where they are to spend the night. But the innkeeper has a surprise in store for his new guests, and not everyone is amused.