2.20 - What Is And What Should Never Be

Dean gets attacked by a Djinn, a creature capable of warping reality. The next things he knows he's in Lawrence, Kansas, in a stable relationship with a woman named Carmen, his mother is alive and well, and he and Sam are no longer on speaking terms. When the idea of a peaceful existence begins to settle in, visions of his previous life as a hunter start appearing out of nowhere.

Source: IMdb