Episode 1
In 2019, a local boy's disappearance stokes fear in the residents of Winden, a small German town with a strange and tragic history.
Episode 2
When a grim discovery leaves the police baffled, Ulrich seeks a search warrant for the power plant. A mysterious stranger checks into the hotel.
Episode 3
It's 1986, and Ulrich's brother, Mads, has been missing for a month. Confusion reigns as past and present intertwine.
Episode 4
Bizarre occurrences give Charlotte a sense of déjà vu, and she suspects Peter is hiding something. Franziska snaps when Magnus confronts her.
Episode 5
Hannah takes her obsession with Ulrich too far. The stranger asks Regina to deliver an important package. Martha is torn between Jonas and Bartosz.
Episode 6
Ulrich looks to the past for answers and dredges up disturbing family secrets. Armed with new tools, Jonas probes the cave's murky depths.
Episode 7
Ulrich questions a frail and frightened Helge in the nursing home. Jonas searches for Mikkel, but the stranger warns him about meddling with the past.
Episode 8
In 1953, the disfigured bodies of two boys are exhumed at a construction site, the future location of Winden's nuclear power plant.
Episode 9
Ulrich runs afoul of the law, Helge tries to dodge Egon Tiedemann, Claudia harnesses the cave's powers, and Katharina lashes out at Hannah.
Episode 10
Peter gets a shock. Jonas learns the truth about his family, but there are more surprises still to come. Helge makes a sacrifice.
