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===[[12.23 All Along the Watchtower]]===
While [[Sam]], [[Dean]] and [[Castiel]] deal with [[Lucifer]], [[Kelly]] finally gives birth to Jack in an explosion of light that renders [[Mary]] unconscious. When Sam notices the light coming from the home, he goes to check on Kelly, only to find her lying dead in her bed. When he hears a noise, he goes to investigate where he notices foot prints leading to Jack's nursery, where he finds an already adult looking Jack huddled in the corner, smiling as his eyes glow gold.