Board Thread:WARNING ALL USERS False Info\Spoilers/@comment-92.238.137.64-20140207010708/@comment-95.149.92.195-20140207152147

What if he had a an affair with Talia and he's actually Derek's father? This is a far out theory, but I think it's more likely than him having an affair with Claudia. They had put a lot of emphasis on family names this season - Kira's dad taking her mum's name, Scott asking why Melissa kept the "McCall" name - and Derek did just have that vision talk with his mother, and we know nothing about Derek's father, except that his name couldn't have been Hale, cause it's both Peter and Talia's name. Maybe Stiles and the Sheriff knew that Agent McCall had an affair, but they don't know it was Talia, or they didn't know she got pregnant?

And when did Agent McCall leave BH? Around the time of the Hale house fire?

Just a theory.