Narrator: HBO's ... In episode one, "Game of Thrones" fans might have recognized Donald Sumpter, the actor who played Maester Luwin. It turns out that his character in "Chernobyl," an elderly ...

Chernobyl explores the aftermath ... The five-part miniseries airs on HBO on Mondays at 9 p.m. ET, with the fourth episode airing May 27.