Whipsaw is a 1935 American crime drama film directed by Sam Wood and starring Myrna Loy and Spencer Tracy. Written by Howard Emmett Rogers, based on a story by James Edward Grant, the film is about a government agent working undercover traveling across the country with an unsuspecting woman, hoping she will lead him to her gang of jewel thieves. The film was produced by Harry Rapf for Metro-Goldwyn-Mayer, and was released on December 18, 1935, in the United States.