Stiles is a skinny, defenseless human dating a werewolf. Derek Hale, Stiles's boyfriend, is an alpha of a pack. Dean Winchester is the husband of Castiel Winchester, and the father of Stiles Winchester. Castiel Winchester is an angel who gave birth to Stiles. Sh, Stiles doesn't know that, though! He also doesn't know...
As Stiles realizes he is not the biological son of the sheriff he decides to do some research on the Winchester name Side Note: This is during season 8 towards the end. Closest to episode 22 "Clip Show"
10 years ago Stiles Stilinski left Beacon Hills. He was kicked out of the pack after the incident with Donovan and for being a "weak, skinny, defenceless human" as Derek Hale loved to remind him. He joins the CIA after Katrina dies. One day Irene Kennedy gives him a mission, one that is in Beacon Hills, California...