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.

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.

Despite Gennat's doubts, Rath organises a meeting with all of the wrestling club bosses; Malu rethinks her plan; Esther looks for work as a musician.

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

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

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.

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.

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.

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.

Malu Seegers and Dr Völcker pursue a deadly plan; Charlotte makes a terrible discovery; Helga tries to escape from her kidnappers.

The SA and SS face each other in the Stennes Putsch; Wendt wants the police to intervene; Toni meets an ally.

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.

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

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.

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.

As a dead man on a park bench in the Tiergarten grabs the attention of the homicide squad; Toni gets caught; Charlotte makes a terrible decision.

Widow Behnke kicks off her high-stakes rescue plan; Stennes instigates a hall battle in the Moka Efti; Charlotte makes a secret observation.

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.

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.

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

As an SA squad marches through town, Charlotte is called to a crime scene; Nyssen throws a huge party with Helga and makes an important announcement.

Rath brings Moritz to the castle; Charlotte tells a lawyer about the deaths among street children; Goldstein takes drastic measures.

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.

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.

Abraham Goldstein arrives in Berlin as the secret organisation White Hand passes a verdict on a criminal; Rath investigates a boxing match.

Weintraub investigates boxing match betting fraud; Rath confesses to Charlotte, who asks him to find out more about Benni's death.

Rath is celebrated for his supposed coup; Charlotte meets a boxer; Stennes plots a coup against Hitler; Goldstein learns the truth about the diamond.

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 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.

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.

In urgent need of money, Charlotte enters a lucrative dance marathon; Councillor Wendt pitches his plans to Nyssen; Rath visits Stennes in prison.

As Rath takes part in a risky experiment, a brutal gang war breaks out in Berlin; widow Behnke tries to help Katelbach; Toni finds herself in danger.

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

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.

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.

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

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