He was the genius behind the boy genius, the hard-boiled newspaperman and hard-bitten alcoholic screenwriter whose co-authorship of Citizen Kane was overshadowed by Orson Welles’s multi-hyphenate talent. But Herman Jacob Mankiewicz was a figure of consequence in Hollywood’s golden age—and something very like the conscience of the film that stands by common consent at the pinnacle of American cinema.

It’s that bittersweet legacy that David Fincher aims to explore—and restore—in Mank, his elegiac new biopic out in limited theatrical release, and dropping on Netflix December 4. With a riveting Gary Oldman in the title role, the film, shot in richly saturated black-and-white, is a rueful love letter to the movies—and to Citizen Kane itself.