In this premiere episode of Season Five, the opening credits are altered somewhat from the previous three seasons. One of those changes is that early on a shot of Mannix standing on a lawn where a young woman pirouettes, briefly showing her panties, has been replaced by a shot of Mannix jumping off a platform onto the back of someone facing away. The new replacement scene is taken from near the end of this episode.
During this episode, Mildred tells Mannix that she previously hired a detective firm to find Leslie, who she described as an international firm that used computers to find people. Then Mannix flashed a brief, knowing smile. Even though the name of the firm wasn't mentioned, it is likely Intertect, Mannix's employer during the entire first season.
The tune being played by the guitarist in the Mexican bar is the same song being played on a stereo in an earlier week. The record sounded like Herb Alpert's Tijuana Brass.
Guy Stockwell's brother Dean starred in Season 5's A Step In Time.