Old Helge tries to stop himself, 33 years ago. Noah enacts more of his plan. Jonas discovers one more terrifying truth.
Ulrich finds himself in a predicament with police. Hannah has other secrets from '86.
In 1953, two kids are found dead on the construction site where the Winden nuclear power plant is about to be built.
Jonas navigates 1986. Ulrich investigates Helge, as Charlotte begins wondering about her father-in-law, too.