Lieutenant Evans was a male Human Starfleet officer who lived during the mid-23rd century. He served in the operations division aboard the USS Enterprise under Captain James T. Kirk, during a historic five-year mission that starship undertook. He served as one of the ship's security officers in 2268. That same year, Evans reported a disturbance in crew quarters to Kirk, and discovered that Troyian Ambassador Petri had been stabbed by the Elasian Dohlman, Elaan. Evans was played by actor Lee Duncan.