The Whistle is a 1921 American silent drama film directed by Lambert Hillyer and written by May Wilmoth, Olin Lyman and Lambert Hillyer.

The film stars William S. Hart, Frank Brownlee, Myrtle Stedman, Georgie Stone, Will Jim Hatton, and Richard Headrick.

[3] Robert Evans (William S. Hart) loses his son, Danny (Will Jim Hatton), due to dangerous working conditions.

His employer, Henry Chapple (Frank Brownlee), refuses to fix the problem.

At the end, Evans realizes that by taking fate into his own hands, he has made himself more unhappy than anyone.