Dean Martin was so distraught over the murder of his The Wrecking Crew co-star and friend Sharon Tate that he abandoned the next already-announced "Matt Helm" motion picture series installment (to be titled "The Ravagers"), and never played the character again.
Bruce Lee was the martial arts adviser for this film. He also was brought in to train and teach Sharon Tate with her martial arts scenes.
Columbia production number 8869.
Film debut (as an extra) of Chuck Norris
This was the final film in the Matt Helm series. Although plans were afoot for a fifth film ("The Ravagers"), as well as a proposed teaming with Frank Sinatra for "Matt Helm Meets Tony Rome", the poor box-office showing of both "The Wrecking Crew" and Sinatra's second go round as Rome in "Lady In Cement" brought the Matt Helm series to an end.