The Big Clock is a 1948 American thriller directed by John Farrow and adapted by novelist-screenwriter Jonathan Latimer from the 1946 novel of the same title by Kenneth Fearing.

John Villiers Farrow, KGCHS was an Australian film director, producer, and screenwriter. Spending a considerable amount of his career in the United States, in 1942 he was nominated for the Academy Award for Best Director for Wake Island, and in 1957 he won the Academy Award for Best Adapted Screenplay for Around the World in Eighty Days. He had seven children by his wife, actress Maureen O'Sullivan, including actress Mia Farrow.