Chernobyl
Please Remain Calm
Season 1, Episode 2 · Aired 2019-05-13

Synopsis
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 the threat of second explosion that could devastate the continent.
In the series
This episode is part of Chernobyl (2019) on HBO/Sky.
Five episodes of institutional failure and radioactive truth — limited series as moral document.
Key cast
- Jared Harris as Valery Legasov
- Stellan Skarsgård as Boris Shcherbina
- Emily Watson as Ulana Khomyuk
- Paul Ritter as Anatoly Dyatlov
- Jessie Buckley as Lyudmilla Ignatenko