When Theo first arrived in Beacon Hills, he was the chimera determined to tear Scott’s pack apart. And in many ways, he succeeded. However, in the second half of season 5, his plan backfired. Not only did Scott’s pack reunite to defeat the Dread Doctor’s, but Theo ended the year by being dragged underground by his dead sister. Yes, you read that correctly. And yet, somehow, it seems Theo survived, because EW can reveal that Cody Christian is returning for Teen Wolf’s upcoming sixth season.