Contains spoilers for this episode and earlier episodes.
In 1921, Jonas questions Adam about their shared future and asks how he can prevent the apocalypse. Adam describes a way around the usual limits of time travel and offers Jonas a journey to the day before Michael's death. He argues that stopping the suicide would remove the event that set Jonas on this path. Jonas enters the dark-matter portal at Sic Mundus, taking the chance to save his father and change what follows.
In 1987, Ulrich escapes the institution and finds Mikkel at Ines's house. The boy recognizes his father after Ulrich recalls their old magic trick, and they embrace. Ulrich tries to take Mikkel back through the caves, but Egon and the police stop them before they enter. Ines takes Mikkel home and later drugs his drink. Claudia asks Egon to move in with her and questions Bernd about the power plant accident and its strange findings.
In 2020, Bartosz demonstrates his machine to Martha, Magnus, Franziska and Elisabeth by taking them to 1987. They see enough to believe him, unaware that the distressed man passing in a police car is Ulrich. Katharina demands help from Hannah, whose payments from Aleksander draw Clausen's attention. Noah visits Charlotte at Tannhaus's old shop and tells her that he is her father. He shows her a baby photograph but withholds her mother's identity, saying Adam hid the truth from him.