- This was John Wayne's final film.
- To add a sense of realism to John Waynes character, archive footage from several of the Duke's westerns was used to introduce J.B. Books after the beginning credits. Included was footage from Hondo (1953), Rio Bravo (1959) and El Dorado (1967).
- When viewing footage of the final gunfight in the bar, John Wayne saw that it was edited to show him shooting a guy in the back. He said "I've made over 250 pictures and have never shot a guy in the back. Change it." They did.
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