- Actor-Inspired Element: It was Robert Webber's idea for Sappensly and Quill to be Ambiguously Gay.
- Banned in China: The film was banned in Germany, and Argentina.
- Creator Breakdown: According to co-writer Gordon T. Dawson, Sam Peckinpah was listless and diffident during filming, plagued by woman troubles at home and over-medicated by quack doctors. Principal photography was marked with an overwhelming sense of melancholy and defeat, perhaps engendered by Peckinpah's use of cocaine (introduced to him by Warren Oates). The screenwriter (a veteran of several Peckinpah films) was so unnerved by the shift in Peckinpah's mental state and mercurial behavior that he resolved never to work with him again. According to Kris Kristofferson, Peckinpah not only printed the improv but rewrote the scene to follow because of it.
- Throw It In!: Isela Vega improvised the scene where she continues prodding Warren Oates about proposing. She kept doing it even after Sam Peckinpah yelled "Cut".
- What Could Have Been: James Coburn and Peter Falk passed on the role of Bennie.
- The original script called for Bennie to get away alive, with both the money and head. During shooting, Sam Peckinpah decided that Bennie had to die, and rewrote it as such.
Trivia / Bring Me the Head of Alfredo Garcia