The mystery woman is a secondary character of The Flintstones: On the Rocks. She is a guest at the same island Fred, Wilma, Barney, and Betty are staying at. Fred is immediately smitten with her, and spends much of the trip fantasizing about her. After a falling out with Wilma, Fred notices her at the bar and seeks solace with her before having to go rescue Wilma. She is later revealed to be an undercover cop who arrests Xavier, the film's main antagonist.