This month, Mel Gibson nabbed a nomination for best director from the Broadcast Film Critics Association. The last we saw Gibson directing, a Mayan priest was tossing heads down the pyramid steps in Apocalypto. In the decade since, he has lost his own head a few times, suffering tequila-induced tirades and effectively achieving for himself excommunication from the Church of Hollywood. Such is perhaps for the best, as it provides for him the freedom to make films that rise above the swirling box office toilet bowl of superhero spandex, toy trolls, and incomprehensible Harry Potter spin-offs. Gibson's latest, Hacksaw Ridge,...