For the regular universe counterpart, see Lance Cartwright.

In the mirror universe, Admiral Lance Cartwright was an officer serving in the Imperial Starfleet. He was part of a military cabal to assassinate Emperor Spock. The cabal also included Colonel Ivan West, Admiral Thomas Morrow, General Quinven of Denobula, and Admirals Robert Bennett, and Salliserra zh'Ferro. They were planning to assassinate him by having Valeris, an assassin, infiltrate the Emperor's elite Vulcan Guard as a suicide bomber. When General Quinven was exposed, Cartwright and the other members of the military cabal were exposed and dealt with while Valeris was killed by Saavik. (TOS novel: The Sorrows of Empire)