The Eleventh Hour is a lost 1923 American melodrama action film directed by Bernard Durning and written by Louis Sherwin.

The film stars Shirley Mason, Buck Jones, Richard Tucker, Alan Hale Sr., Walter McGrail and June Elvidge.

[1][2][3] Wanting to take over the world, the mad and evil Prince Stefan de Bernie plots to acquire a new explosive developed at a plant owned by Barbara Hackett.

After a number of adventures involving wild chases in motorboats, airplanes, and submarines, fights with lions, and rescuing Barbara from being lowered into a pit of molten steel, McDonald foils Prince Stefan's plans.

[1] [6] Between February 26 and March 2, 1923, Twentieth Century Fox used the United States Navy submarine USS R-6 in filming The Eleventh Hour.