| "The Mistress" may be referring to two or more different villains. If you're uncertain which one you're looking for, just flip a coin.|
If you came here from a link, please go back and make the right link for one of the villains listed below.
- The Mistress (Ghostbusters) - A power-mad interdimensional demon and a villainess from the Extreme Ghostbusters cartoon show.
- The Mistress (TMNT) - An evil ninja and a villainess from the TMNT series.
- The Master (Doctor Who) - Was referred to as The Mistress after regenerating into a woman.
- The Mistress (Superjail!) - The Warden's archenemy.