Based on an earlier TV production of the same material.
Last screenplay written by Hugo Butler, who had been black-listed by Hollywood and exiled himself to Mexico during the 1950s.
This film is listed among the 100 Most Enjoyably Bad Movies Ever Made in Golden Raspberry Award founder John WIlson's book THE OFFICIAL RAZZIE® MOVIE GUIDE.
This was Kim Novak's last starring role in an American-made feature film.
When Kim Novak walks along Hollywood Blvd, a theater she passes by is playing The Dirty Dozen, a film Robert Aldrich made a year earlier, and whose commercial success made it possible for the director to start his own production company and make movies like this.
When MGM executives finally screened the film, they decided to market it as being "deliberately campy", but audiences in 1968 were not yet ready to embrace the idea of going to see something trashy on purpose, and the movie proved to be a box office bomb despite this trend-setting marketing ploy.