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…

Erin is so excited that teenage Katya ‘a child of Chernobyl’ is coming to stay, but Katya is not exactly grateful to be in Derry. And there’s developments in Granda…