John Sheppard (OU)

John Sheppard was a human member of the Atlantis Expedition. He randomly showed up on board the Makuta Space Station along with Rodney McKay, and was trapped in a force field by Krika. He was still on board when the station blew up, but later he appeared again on Atlantis and shot Blackout with a P90. Sadly, he failed to realize that this wouldn't work, and was blasted with shadow energy and thrown into a wall. His current status is unknown, but he probably didn't survive that and the subsequent destruction of Atlantis.