|“||Please forgive me.||”|
— Dean to Sam before attempting to kill him
in Proverbs 17:3
Dean Winchester is a hunter who existed in an alternate universe.
He is an alternate reality version of Dean Winchester.
At some point, Dean's brother Sam said "yes" to the archangel Lucifer, becoming his vessel. Though devastated, Dean decided to try to kill Lucifer with the Colt despite the fact that it would kill Sam as well. Coming up behind
Lucifer in the Men of Letters bunker, Dean shot the archangel through the back of the head with the Colt. However, Lucifer was immune to the Colt's power and quickly healed the wound. Stating that it always had to end this way, Lucifer burned Dean to death.
In The Trap, God reveals that all of the visions Sam has seen are really God's memories of the deaths of Sam's and Dean's from alternate realities.