An Enterprise officer who served as navigator and later as assistant chief engineer, briefly commanding the ship during the Pyris VII crisis.
DeSalle is a lieutenant aboard the USS Enterprise, first seen at the navigation station when the ship encounters the being Trelane. He is also among the crew affected by the spores of Omicron Ceti III, joining the mass desertion of the ship.
By the time of Catspaw he has become assistant chief engineer. With Kirk, Spock and McCoy on the surface of Pyris VII and Scott held captive, DeSalle commands the Enterprise and considers leading a rescue party. He was played by Michael Barrier.