Fritz Lang was the visionary director of Metropolis, M, Fury, The Big Heat and over thirty other memorable films. But what lurks behind his legendary genius?Did Fritz Lang murder his first wife? Did he really refuse an offer from Hitler to become the Third Reich's 'Fuhrer of film' before he fled to the United States? Was Lang a sensitive artist or a sadomasochist whose cruel on-set behaviour was mirrored in a sordid love life crowded with prostitutes and mistresses? Patrick McGilligan demolishes the myths created by Lang and reconstructs the fascinating, flawed human being behind the monster with the monocle.