In 1929, a freight train traveling from the Soviet Union is hijacked. Meanwhile, Chief Inspector Gereon Rath from Cologne pursues a mission in Berlin.

While interrogating König, Rath loses control of the situation. Charlotte moonlights to make ends meet. An alter ego commits a betrayal.

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

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.

Kardakow realizes his first instinct was correct. A photo enlargement yields two leads. Rath and Charlotte get key intel from a colorful character.

Rath confesses to a priest -- and later to Wolter. Charlotte charms medical student Rudi into performing a secret autopsy, which uncovers a vital clue.

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.

Greta goes on a romantic outing with Fritz. Krajewski finally reveals where the film is hidden. A new patient is brought to Dr. Schmidt for treatment.

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.

Jänicke spots a match that leads to two suspects in the Red Fortress massacre. Blackmail and bribes fuel a Soviet-German tug-of-war over the train.

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.

Defying Benda's orders, Rath and Charlotte race to intercept the train. Helga speaks her mind at a memorial. Greta participates in a vengeful plot.

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.

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 hits an unexpected snag while investigating the Benda case, and later tracks down the movie set gaffer. Charlotte is visited by her older sister.

Wendt finds a way to change Greta's testimony. Nyssen's aide asks bank clients about their stock purchases. A casting call is held to replace Betty.

Evidence from Krempin's home reveals his and Rot's interest. A neighbor gives Charlotte something her mother left. Gräf accesses the Benda case file.

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

Nazis storm Tempo's office in search of Katelbach. The name list leads Rath to identify the men behind Benda's murder. Charlotte catches Vera in a lie.

Rath picks up Richard for a lineup. Ullrich finds a hair in a locket Tilly wore. Nyssen presents a proposal to Gen. Seegers. The Phantom strikes again.

Litten faces a setback in appealing Greta's conviction. Wendt talks economics with Gen. Seegers's daughter. An unconscious Weintraub is forced to talk.

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.

Desperate to find Weintraub, the police consult a psychic. Toni's job takes an unexpected turn. Moritz's association with Horst puts him in danger.

Benda's widow gives Wendt a piece of evidence. A crisis bonds Helga and Nyssen. Fingerprints are found on the knife, but Charlotte notices an oddity.

Litten remembers a legal loophole that could save Greta's life. Charlotte visits the inn mentioned in her mother's love letters. Wall Street crashes.