Mackenzie Calhoun (born M'k'n'zy of Calhoun) is a fictional character from the Star Trek universe. Created by Peter David, Calhoun is an extraterrestrial from the planet Xenex, and is captain of the Federation starship USS Excalibur.
Calhoun appears primarily in Star Trek: New Frontier, a series of spin-off novels and comic books set during the 24th century era of Star...