stephan is not dead yet he dies in episode 7 because of leek has control of future predator and all the creatures frm series 2 at the end they all go through a future anomaly and force one person to leave behind to fight them and they choose stephan for everything that he has done and thats how he dies
This is wrong they dont go through a future anomaly at all its the room with the all the predators in he has to go in to lock not to fight the predators