We see Adam imagining Martha sitting across from him. The narrator says "People are peculiar creatures. All their actions are driven by desire, their characters forged by pain. As much as they might try to suppress the pain, to repress desire, they cannot liberate themselves from eternal servitude to their feelings. As long as the storm rages within them they can find no peace. Not in life, not in death. And so, day after day, they will do all that must be done. Pain is their ship, desire their compass. All that humankind is capable of." During this time we see Hannah in Jonas's room taking the time machine while imagining Ulrich, Martha looking at the St. Christopher's medal while imagining Jonas and Katharina imagining Mikkel.
It’s June 26. Egon and his coworkers inspect Claudia's corpse in the station's morgue. Egon immediately recognizes her, saying that she had come into the police station before, apologizing profusely to him but making little sense otherwise, on the same day that the missing Helge returned. She is shown to have unusually high levels of radiation. One of the other officers suggests that Egon show a photo of Claudia to Helge, to see if he can shed some light on the mysterious dead woman.
Claudia is sitting at her desk in her office at the nuclear power plant, recording her research findings. When she realizes that it's the day her father Egon is supposed to die, she hurriedly rushes out to see him.
Adult Jonas wakes up in his bed and looks for Hannah. She is no where to be found. Hannah stands at the caves with the machine in her hand and stares into the darkness. She walks into the caves. Katharina stares at the tattoo on her arm and the documents on the floor in Mikkel's room. Charlotte shows her husband the photo of her as a baby and repeats what Noah told her about the world ending. She tells him that her mother is alive. Clausen is looking at a photo of Alexsander when he is interrupted with new information about him.
Martha, having found the St. Christopher medal (left by the adult Jonas) thinks Jonas has returned, as Bartosz predicted. She mentions this to her friends and she and Bartosz argue. She makes it clear their relationship is over.
Egon shows Helge the photo of Claudia and asks if he knows who she is. Helge says that while he doesn't know her, he's heard about her. They call her the White Devil and while he doesn't reveal his source for this information, he claims that Claudia wants to kill everyone. Egon then points out that Claudia is dead, so she can't hurt anyone any longer. Helge responds, "...she hasn’t even begun yet."
Claudia continues to push Egon to move in with her. Egon shows increasing reluctance to leave his comfortable apartment. Claudia, disheartened, then asks if she can come with him to his first chemotherapy appointment that day, to which Egon responds with heartfelt joy.
Clausen closes in on Aleksander, stating he is being charged for identity theft and obstruction. He says he is looking for Aleksander Köhler, who is his brother. He says he believes his height is different to what his documents state.Clausen proceeds to arrest him for identity theft.
Martha heads off on her own to Hannah’s house. While Hannah isn’t there, the adult Jonas (The Stranger) is and lets her in. Martha asks who he is. She looks at him strangely and he asks if she is scared of him. She says she is experiencing deja vu. As he did previously, he responds "a glitch in the matrix." He asks whether she found the St. Christopher medal he left for her. She then realizes that he is Jonas.
Egon begins to tell Claudia that he knows time travel really exists
Hannah uses the time machine she stole from the adult Jonas (The Stranger) to travel back in time to 1954. She goes to the police station to see Egon, stating she is looking for her husband who might be the man accused of murdering the children. She lies when asked about her name that she is Katharina Nielsen.
Sitting at the kitchen table, Jonas starts to explain his absence to Martha. She says it all makes sense now. She takes his hand in hers and touches his forearm and face. They are interrupted by Katharina who breaks into the house searching for Hannah. On seeing Martha and Jonas together she pulls them apart and asks Martha whether she knows who this man is. He is the son of her brother, her nephew. She tells Jonas to keep his dirty hands off her and takes Martha away.
Aleksander is sitting in an interrogation room with Clausen enters. Clausen places a gun on the table in between them and states that his brother vanished in 1986, similar to Mads. His name was Alexander Köhler, just like his. Clausen reveals a letter and passes it across the table and demands Aleksander read it out loud. The letter stated he would find answers about his brother in Winden. He knows Aleksander is not his brother and leaves the room.
Egon, slightly suspicious at the sudden appearance of a relative, takes her to visit Ulrich at the psychiatric institution, asking her to try to get a confession from him. He asks if she's ever heard of the White Devil and she says no.
At the Doppler house, Franziska, Magnus, and Elisabeth share what they know with Charlotte and Peter, who are actually already aware of the time-travelling occurring. Once Franziska realizes that her parents are not surprised by the news about time travel, she gets angry that they kept this knowledge a secret, as well as her father's affair. Magnus receives a call from Martha, with the news that Jonas is back- as Bartosz had predicted- but is older. Mikkel and their father are alive but in another time.
Ulrich is taken to Hannah in his straight jacket. He asks if she is real. He asks about Mikkel, Katharina, Martha and Magnus. Hannah, sensing that he cares more about Katharina and his family, asks him who he would choose between her or Katharina or if he ever loved her. He tells her he loves her and will leave Katharina if she can get him out of there. But his words sound hollow and desperate, just in the hope she will get him out. She tells Ulrich he does not need her now and turns around as Ulrich is brought back, yelling in desperation. She tells Egon that despite a slight resemblance, Ulrich is not her husband.
Martha hugs Katharina and assures her everything will be fine. Magnus enters with the machine and opens it. Katharina goes upstairs with it. Martha tells Magnus that Mikkel and Ulrich are alive.
When Egon and Claudia arrive at his apartment to get his medicine, Egon starts to put the facts together and realizes that Ulrich kept returning to the caves. Claudia grows increasingly hostile and defensive. He tells Claudia she knows about time travel too and it is connected to the power plant. He starts phoning the police to search the caves. Claudia stops him and says this is too important to be jeopardized. He tells Claudia she has no heart. They struggle over the phone and Egon falls backwards, cracking his head open on the table. Claudia calls an ambulance (which could have saved his life) but hangs up, remembering what her older self said about sacrifices and everything happening as it always has so Regina will live. Egon speaks his last words to his daughter: "You are the White Devil."
Back in Egon's office, he apologizes for not reacting sooner. He asks if she is leaving. Hannah states that she lost everything back where she came from and is looking for a fresh start.
After leaving her father to die, she heads home visibly distraught, and begins to wash the blood from her hands. She sobs uncontrollably. She is then startled as the teenage Jonas enters with a key but she does not know who he is or how he has a key. She realizes he must have got it from her older self. He tells her that they have to go and don't have much time. He knows what she did, but it doesn't have to happen again. Next time. "Where are we going?" she asks, "To the future," he responds.
- Adam: People are peculiar creatures. All their actions are driven by desire, their characters forged by pain. As much as they might try to suppress the pain, to repress desire, they cannot liberate themselves from eternal servitude to their feelings. As long as the storm rages within them they can find no peace. Not in life, not in death. And so, day after day, they will do all that must be done. Pain is their ship, desire their compass. All that humankind is capable of.
- Egon: Do you know this woman?
Greta: Answer the sergeant.
Egon: Were you with her maybe? Did she lock you in?
Helge: He told me about her. The White Devil.
Egon: Who? Who told you about her? The man who did that to you? The White Devil. Tell me about the White Devil.
Helge: She wants to kill us. All of us.
Egon: She's dead. She can't hurt anyone anymore.
Helge: But she hasn't even started yet.
- Aleksander: What is it?
Clausen: A copy of a document from the Marburg Registry Office, the data on your last ID before you left Marburg.
Aleksander: I've no idea how this is relevant.
Clausen: Nothing stands out?
Aleksander: No. What should stand out?
Clausen: You're 5' 6", I bet. Tops. That document says 5' 8". So I'm wondering where it is?
Aleksander: Where is what?
Clausen: The two inches missing.
- Egon: You were always different. You saw the world differently from the very start. Sometimes I think that that's my problem—that I can't see the world as it truly is.
- Clausen I have no idea what's going on in this town. But I'm very certain of one thing: you are definitely not my brother.
- Claudia: What's in the caves eclipses all scientific discovery. That substance turns all we know about the universe on its head. And you want to risk all of that? For nothing?
Egon: You haven't changed. It's still all about you. You have no heart.
- Hannah: I lost everything where I came from. All I want is a fresh start.
- Jonas: I know what you did. She told me. But she also said it didn't have to happen that way again, next time.
Claudia: Where are we going?
Jonas: To the future.
- The White Devil - Der weiße Teufel is a 1930 German film adapted from the Tolstoy novella Hadji Murat, in which the titular character forms an alliance with his enemies in order to exact personal revenge.
- The Matrix - In the 1999 science fiction film The Matrix, what humans perceive as reality is actually a massive computer simulation, and a feeling of déjà vu indicates a "glitch in the Matrix."
- Egon sees Claudia's corpse, not realizing then that this is his time traveling daughter, while 33 years later Claudia sees Egon die, as he finally realizes Claudia is that woman.
- Among the items found on Claudia's body is a pocket sundial, which can be used to estimate time and provide direction. This is the first time such a device has been depicted on the show.
- Aleksander Köhler's height is listed as 175 cm (almost 5'9"), and Clausen estimates Aleksander Tiedemann's height at 171 cm (a little over 5'7"). It is not clear why the subtitles use different measures.
- The adult Jonas seems just as awkward around Martha as he was as a teenager.
- Katharina breaks into the Kahnwald home, just as adult Jonas broke into her home.
- Hannah had previously blackmailed Aleksander to destroy Ulrich and now does so herself.
- Claudia wanted to prevent her father's death, as Jonas had but ironically, the events they were trying to prevent happened because of their actions trying to stop them.
- In the preceding episode Jonas asks Claudia who she is. In this episode Claudia asks the same of Jonas.
- Who wrote the anonymous letter to Clausen?
- Dietrich Hollinderbaumer as Adam
- Lisa Vicari as Martha Nielsen
- Andreas Pietschmann as The Stranger
- Maja Schöne as Hannah Kahnwald
- Oliver Masucci as Ulrich Nielsen
- Louis Hofmann as Jonas Kahnwald
- Jördis Triebel as Katharina Nielsen
- Daan Lennard Liebrenz as Mikkel Nielsen
- Sebastian Hülk as Egon Tiedemann (1953)
- Lisa Kreuzer as Claudia Tiedemann
- Florian Panzner as Daniel Kahnwald
- Stephan Kampwirth as Peter Doppler
- Karoline Eichhorn as Charlotte Doppler
- Sylvester Groth as Investigator Clausen
- Gina Stiebitz as Franziska Doppler
- Paul Lux as Bartosz Tiedemann
- Moritz Jahn as Magnus Nielsen
- Carlotta von Falkenhayn as Elisabeth Doppler
- Cordelia Wege as Greta Doppler (1954)
- Tom Philipp as Helge Doppler (1953)
- Christian Pätzold as Egon Tiedemann (1986)
- Peter Benedict as Aleksander Tiedemann
- Henning Peker as Pathologist Udo Meier
- Lea Willkowsky as Jasmin Trewen
- Leopold Hornung as Torben Wöller
- Mieke Schymura as Officer Justyna Jankowski
- → See 33 images from The White Devil at Images from The White Devil.