A missing child sets four families on a frantic hunt for answers as they unearth a mind-bending mystery that spans three generations.

Six months after the disappearances of Mikkel, Jonas and Ulrich, Winden's web of mysteries deepens -- and the fate of the world hangs in the balance.

The time-twisting madness reaches its conclusion in a strange new world, where some things are quite familiar — and others are disturbingly not.

In 2019, Jonas emerges from the cave into a strange but familiar world: the town of Winden, reeling from the recent disappearance of a young boy.

Martha travels to 1888 to warn her friends about the 2020 disaster. Winden residents past and present search for their missing loved ones.

Charlotte and Ulrich try to piece together what happened in the bunker. In different times and worlds, Jonas and Martha work to gain each other's...

Martha and Jonas travel to 2052 and get a glimpse of a grim future. In 1954, two residents of Winden go missing, and Hannah receives surprising news.

In 2020, a visitor delivers a warning to Claudia. The day before the apocalypse, Jonas begins to question Eva's motives.

Adam holds Martha captive in 2020. On the day of the apocalypse, an increasingly frantic Martha begs Bartosz for his help.

Across three centuries, Winden's residents continue their desperate quest to alter their fate and save their loved ones.

Claudia reveals to Adam how everything is connected — and how he can destroy the knot.