The Big Clock is a 1948 American film noir directed by John Farrow and adapted by novelist-screenwriter Jonathan Latimer from the 1946 novel of the same name by Kenneth Fearing.
The black-and-white film is set in New York City and stars Ray Milland, Charles Laughton, and Maureen O'Sullivan. Elsa Lanchester and Harry Morgan, in an early film role, also appear.
You can find out more about this movie from Wikipedia and read an article from FILM NOlR of the Week.