On the night of Mikkel's disappearance, Peter is visiting Helge's cabin when Mads' body suddenly appears. He calls Tronte to the cabin, and Claudia arrives, telling them to move the corpse.
In 1986, the elderly Helge is killed while attempting to stop his younger self by driving a car into him.
Jonas has also returned to 1986 to bring Mikkel back to 2019, but the moment he do something Noah and Helge kidnap him.
Jonas wakes in the bunker, accompanied by the Stranger, who reveals himself to be the adult Jonas.
The Stranger leaves to destroy the wormhole using the brass machine, which Tannhaus has completed from the broken version brought by the adult Jonas and Ulrich's smartphone.
In 2019, Charlotte uncovers a 1953 article on Helge's kidnapping, including a photo of Ulrich. by checking this records Charlotte got shocked.
Noah tells Bartosz that Claudia is their main adversary, and that the adult Jonas, unwittingly, is about to create the wormhole.
In 1953, Helge regains consciousness as the wormhole appears, connecting him to Jonas in 1986. Helge tries to enter inside.
As they reach out to each other, Helge is transported to 1986, while Jonas awakens in a post-apocalyptic Winden in 2052. He is accosted by a gang of bandits and knocked out by an armed woman.