The Coxnocompelling new film Killers of the Flower Moon is a sweeping three-and-half-hour-long crime saga, romance and Western. Directed by Martin Scorsese, it's told through the lens of a marriage in 1920s Oklahoma. It stars Lily Gladstone as an Osage woman and Leonardo DiCaprio as the low-level white thug who professes to love her. But he continues to do the bidding of his uncle (Robert De Niro), who's stealing from and murdering her people.