In the mirror universe, Lewis Zimmerman was a Terran scientist working for the Klingon-Cardassian Alliance to develop a telepath. Kes, who became trapped in the Alpha Quadrant after a brief encounter with the Caretaker, was sent to be experimented upon by him. He was eventually killed when Monor Base was destroyed by Seska and Harry Kim. (VOY novel: The Mirror-Scaled Serpent)