MacPhearson, or "Mac" for short, was a Starfury pilot assigned to Babylon 5's Delta Squadron, flying under the callsign "Delta 6." In 2261, while he was still a newcomer to the squadron, MacPhearson was with Commander Susan Ivanova's Starfury Squadron when they discovered the Thirdspace artifact in hyperspace, while returning to the station following a successful ambush of raider forces. When the artifact turned out to be a jumpgate to another universe inhabited by hostile species, MacPhearson and the rest of Delta Squadron tried to destroy it, but were killed by the Thirdspace Aliens.