The Big Sleep is one of the best detective genre films Hollywood ever produced. Working from source material by Raymond Chandler, screenwriters William Faulkner, Leigh Brackett and Jules Furthman stuck closely to the plot of the book. The Big Sleep introduced hard-boiled shamus Philip Marlowe and follows his attempt to solve a seamy case of blackmail and murder. The role perfectly suited Humphrey Bogart's tough guy persona. His costar Lauren Bacall delivers a seductively silky performance. The snappy dialogue throughout the film is unparalleled. However, somewhere in the process, the narrative of the film was lost. With the recent discovery and DVD release of a 1945 prerelease version alongside the familiar 1946 version, the reason for this becomes clearer.