Mac and Molly Mange are brought back from the dead as robotic gangsters. The bloodthirsty bionic duo seek their revenge against their enemies, including Mayor Manx, who they think denied their parole.
Callie Briggs is the Deputy Mayor of Megakat City and is often the one running it while Mayor Manx is teeing off for another round of golf. She is highly independent, and has proved on more than one occasion that she is quite capable of taking care of herself during a crisis. She is a friend to the SWAT Kats, and alerts them of any trouble happening within the city that they should be aware of.