Chernobyl

Please Remain Calm

Aired May 13, 2019 · 9:00 PM ET · 1h 05m

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.