"The series ends with an epilogue noting that, while the official death toll remains 31, other estimates have ranged from 4,000 to 93,000, with some estimates climbing even higher."

This was the worst moment in the series. The otherwise pretty solid description of the event was tainted by that. I screamed at the screen. The correct statement would be closer to:

"60 deaths have been directly attributed to Chernobyl, and large careful consortia of hundreds of scientists concluded in the 2000s that "up to 4000" early deaths may occur from the accident across the decades, though they later revised the statement to say they do not recommend multiplying small doses by large populations to get large death values. Meanwhile, a few fringe groups and Greenpeace said 93,000 and Helen Caldicott says millions just because she feels that it must be that high. By the way, burning fossil fuel kills 4 million people every year by air pollution. That's a Chernobyl every 2.5 days, day after day. So even though Chernobyl was horrible, the dispassionate numbers show that nuclear energy is still extraordinarily safe compared to other major forms of energy production. Plus it is very nearly carbon free, which matters more than ever today."

The UNSCEAR group with the 4000 number is analogous to the IPCC. The 93,000 and beyond people are analogous to the anti-vaxxers. The HBO series gave them equal weight.

Look it up! It is truly shocking.