Rath’s pharmacist gets shady instructions. Rath learns who’s behind the train smuggling operation and why, and recalls the last time he saw his brother.

At the May Day protest, police action spirals out of control. A body is found in a canal. An unsuspecting Svetlana returns to her apartment.

The freight train arrives in Berlin. Tempers explode in Charlotte’s household. Aspiring inspector Jänicke makes use of a surprising skill.

Rath, Charlotte and Böhm attend Rot’s mysterious event. Nyssen visits Helga, who questions her recent actions. Greta returns to court for sentencing.

Nyssen finds a way to get his mother’s money. Rath learns who Helga’s benefactor is. Marie-Luise Seegers approaches Katelbach’s landlady with an offer.

An associate of the Armenian is released from prison. An act of sabotage kills an actress during filming. Helga secretly visits a doctor, as does Rath.

Rath, Charlotte and Böhm attend Rot’s mysterious event. Nyssen visits Helga, who questions her recent actions. Greta returns to court for sentencing.

Nyssen finds a way to get his mother’s money. Rath learns who Helga’s benefactor is. Marie-Luise Seegers approaches Katelbach’s landlady with an offer.

An associate of the Armenian is released from prison. An act of sabotage kills an actress during filming. Helga secretly visits a doctor, as does Rath.

Trochin transacts his deal with Benda. Moritz snoops in Wolter’s cellar. Rath and photographer Gräf gather proof of a secret air force base in Lipetsk.

The ballistics report in a police officer’s murder casts suspicion on two colleagues. While her employers are out, Greta steals a moment with Fritz.

Greta witnesses a horrifying scene. In police custody, the Black Reichswehr leaders are visited by a collaborator. Charlotte fights for survival.

A radio announcement makes Rath realize what the Black Reichswehr is planning. Charlotte stumbles upon a find that she hopes will save her life.

Greatly outnumbered, Rath, Henning and Czerwinski use their wits to fight their foes. Svetlana is tracked down. Dr. Schmidt forces a truth to be seen.

A mass grave is found in the woods. Charlotte’s sister Toni makes a troubling discovery. A meeting with Homicide leads Rath to a dreadful realization.