User blog comment:Paul.rea/Is Lydia Possessed by the Spirit of Peter Hale?/@comment-86.149.149.248-20120622172731

I think whats happened is similar to what happened to Oivia in season 1 of Fringe where she used a devce to read her dead boyfriend's mind. A part of him got stuck in her and stayed for a whie and she had the same expiriance has lydia in the halucinaion department.