Contains spoilers for this episode and earlier episodes.
In the original world's 1888, the alternate Martha meets Magnus, Franziska and Bartosz, who escaped the apocalypse with the adult Jonas. Their machine has no fuel, leaving them stranded at the Tannhaus factory. Martha insists that she knows a younger Jonas who visited her world, but the adult Jonas has no memory of doing so and suspects deception. Bartosz shows her the rooms of Sic Mundus and explains Jonas's attempts to rebuild a way home. She tells him that Jonas will become Adam.
In 1987, Katharina searches for Mikkel and discovers that an elderly man previously tried to take him away. Her enquiries lead to the psychiatric hospital where Ulrich has spent decades. The nurse who admits her is Katharina's own mother, Helene. Katharina finally sits opposite Ulrich, who recognises her. Meanwhile, the three cleft-lipped figures kill Claudia's former secretary, Jasmin, continuing their movement through the original world's past without explaining their purpose.
In ruined Winden in the September following the 2020 apocalypse, Peter and Elisabeth search the lists and photographs of the dead for Charlotte and Franziska. Young Noah approaches Elisabeth and promises to protect her, alarming Peter. Claudia makes recordings about the catastrophe while caring for Regina, but Tronte visits Regina alone and suffocates her, saying it is necessary to save her. In the alternate world's 2019, elderly Martha warns the younger Jonas that her world will suffer its own apocalypse in three days.