Castle on the Hudson (UK title: Years Without Days) is a 1940 American film noir drama directed by Anatole Litvak and starring John Garfield, Ann Sheridan, and Pat O'Brien. A thief is sent to Sing Sing Prison, where he is befriended by the reform-minded warden. The film was based on the book Twenty Thousand Years in Sing Sing, written by Lewis E. Lawes, on whom the warden (played by O'Brien) in the film was based. Castle on the Hudson was actually a remake of an earlier Spencer Tracy prison film, 20,000 Years in Sing Sing (1932), also based on Lawes's book.