Regina discovers that she has breast cancer, and Ulrich learns that his father was having an affair with Claudia at the time of Mads' disappearance.
After learning that Regina was the last one to see Mads in 1986, Ulrich confronts her. Both are angry and blaming each other for the past.
While she admits to resenting him for bullying her during their childhood, she also makes him see that Hannah was the one framing him for rape
Visiting the morgue, Ulrich finally realises that the dead boy is Mads, not aged since 33 years ago.
Meanwhile, Jonas fails to tell his mother about the suicide letter but enters the caves armed with his father's notes and the equipment from the package sent by the Stranger.
Within the caves, he finds a door with a Latin phrase, Sic mundus creatus est ("Thus the world was created").
After crawling through to the other side, he notices flyers put up for the missing Mads Nielsen. Which makes Jonas strange.
A van drives by and stops; in it are 14-year-old Hannah and her father Sebastian, offering Jonas a ride in the rain, warning him about contaminated rain from the recent Chernobyl disaster.