Robert F. Lyons's film debut.
During location filming in Washington, DC, Martin Luther King was assassinated. The resulting riots in the capital caused the shooting company to wrap early and return to Los Angeles. Visible in the rear window of the cab during Jean Seberg's ride through the city, buildings are burning and smoke is obvious.
In the Matthews' bedroom there is a photograph of Jean Seberg on the dresser, which is actually a publicity still from Lilith.