Daenerys brings her forces to King’s Landing.

In the wake of a costly victory, Jon and Daenerys look to the south as Tyrion eyes a compromise that could save countless lives.

The Night King and his army have arrived at Winterfell and the great battle begins. Arya looks to prove her worth as a fighter.

The battle at Winterfell is approaching. Jaime is confronted with the consequences of the past. A tense interaction between Sansa and Daenerys follows.

Arriving at Winterfell, Jon and Daenerys struggle to unite a divided North. Jon Snow gets some big news.

Valery Legasov, Boris Shcherbina and Ulana Khomyuk risk their lives and reputations to expose the truth about Chernobyl.

Valery Legasov and Soviet Deputy Prime Minister Boris Shcherbina consider using lunar rovers to remove radioactive debris, while Ulana Khomyuk faces government hurdles in determining the truth about the cause…

Lyudmilla Ignatenko, a Pripyat resident, ignores warning about her firefighter husband’s contamination. Valery Legasov lays out a decontamination plan, complete with human risks.

With untold millions at risk after the Chernobyl explosion, nuclear physicist Ulana Khomyuk makes a desperate attempt to reach Valery Legasov, a leading Soviet nuclear physicist, and warn him about…

April 26, 1986, Ukrainian SSR. Plant workers and firefighters put their lives on the line to control a catastrophic 1986 explosion at a Soviet nuclear power plant.