High Quality Content by WIKIPEDIA articles! "What Is and What Should Never Be" is the twentieth episode of the paranormal drama television series Supernatural`s second season. It was first broadcast on May 3, 2007, on The CW. The narrative follows series protagonist Dean Winchester (Jensen Ackles) who finds himself in an alternate reality after a confrontation with a djinn. The creature appears to have fulfilled Dean`s greatest wish: that his mother had not been killed when he was a child. Dean is happy in the new world until it becomes apparent that his previous work as a hunter of supernatural creatures has been undone. At this point he rejects the alternate reality, and attempts to find a method to bring himself back.