Captain Apache is a 1971 Spanish-British acid Western film directed by Alexander Singer and starring Lee Van Cleef, Carroll Baker, and Stuart Whitman.

The film was based on the 1965 novel Captain Apache by Sidney Edgerton Whitman, a prolific writer of Western fiction.

The vocals of the opening and credits song were written by Dolores Claman and performed by Van Cleef.

Each time he nears discovering the meaning of the phrase, another character capable of providing certain help in solving the mystery dies and throws him off the trail.

The journey eventually takes the captain to a train, one which pulls a private railroad car named April Morning, transporting President Ulysses S. Grant.