Supernatural (TV series)/Recap/S02/E20 What Is and What Should Never Be

Season 2, Episode 20:

What Is And What Should Never Be
Dean wakes to a world where he's living with his nurse girlfriend, his mom is alive, and neither he nor Sam grew up as hunters.

Tropes

 * All Just a Dream
 * It's a Wonderful Life
 * Our Genies Are Different