““Truth be told, the flashbacks were not in the original draft [of ‘A Very Supernatural Christmas’],” confesses writer Jeremy Carver. “We had to add some page count, and it was actually Ben Edlund who came up with doing flashbacks, which added this whole new dimension to the episode.””
— Knight, Nicholas. Supernatural: The Official Companion Season 3. Titan Books, 2009: 53. (via justanotheridijiton)