To everyone’s surprise, the “Chernobyl HBO mini-series” hit the streaming world with a bang. Who would have thought a five-hour reprise of the world’s worst nuclear accident, way back in 1986, would enthrall non-specialist viewers? But it has caught on for one reason: it is an exemplary example of movie making. The subject matter is “on song” to me (I’m writing a history of nuclear reactors) but even I was swept up by a combination of a riveting, theme-soaked script, careful period scene-setting, impeccable casting and acting, and even a weird atonal soundtrack. Over five hours, it is impossible to both “get the whole damned thing essentially accurate” and “follow the original chronology completely faithfully,” and fortunately creator/writer Craig Mazin has opted for the former approach, which works in a deeply holistic way. (If you’ve a completist bent, do yourself the added favor of listening to Mazin chatting with Peter Sagal on the accompanying “The Chernobyl Podcast” episode after each episode viewing.) Johan Renck’s direction is meticulous and infused with purpose. The script zings! Jared Harris nails the lead character Legasov but Stellen Skarsgard almost steals the show as Soviet strongman Shcherbina. “Chernobyl” is a must-see (it’s my only 10/10 rating since Cormac McCarthy’s “The Road“) about a subject that remains pertinent.