Michael Jackson was quite possibly the most famous entertainer of the 20th century. When he died in June 2009, it seemed like the long-boiling national conversation around the multiple allegations of child molestation against him died, too; the focus instead shifted to his planned This Is It comeback concerts, his unreleased songs and a musical legacy that includes hundred of millions of albums sold.

But on Jan. 25, the Sundance Film Festival debuted the four-hour documentary “Leaving Neverland,” which details accusations of abuse, almost instantly reopening the discussion on one of the most notorious scandals in music history. (The film airs in two parts on HBO March 3 and 4.) If you didn’t know why Jackson is leading the news cycle nearly 10 years after his death, here’s a brief explainer.

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What is ‘Leaving Neverland’?

“Leaving Neverland” is a two-part mini-series focusing on the allegations of two men who say Michael Jackson abused them as children. It’s directed by the British documentarian Dan Reed, who directed the 2016 HBO doc “Three Days of Terror: The Charlie Hebdo Attacks.”

What are the accusations in the documentary?

Wade Robson, a choreographer who has worked with Britney Spears, and James Safechuck, a computer programmer who appeared in commercials as a child actor, said they met Jackson when they were 7 and 10, and assert that he molested them for years. Robson and Safechuck (who appeared alongside Jackson in a memorable 1987 Pepsi commercial) detail allegations like mutual masturbation, oral and anal sexual acts, alcohol, lavish gifts and pornography. Robson, who says Jackson nicknamed him “Little One,” describes what he says was the singer’s methods to keep him from speaking out. Safechuck talks about a secret “wedding” he had with Jackson, and the ring he still has in his possession, saying Jackson gave him jewelry in exchange for sexual favors. Both men supported Jackson during a 2005 trial for molestation and denied he had abused them. However Robson and Safechuck both sued Jackson’s estate after the star’s death. Robson said Jackson molested him for seven years, and Safechuck said he and Jackson engaged in sexual acts “hundreds” of times. Both cases were dismissed and are under appeal..