|Dates|| September 29, 1990 - 2009|
Resurrected early 2010
|Occupation||Student of the University of Wisconsin|
|Episode(s)|| 4.19 Jump the Shark|
5.18 Point of No Return
5.22 Swan Song (as Michael's vessel)
Adam: Great. You know, you pitched this whole dewy-eyed bromance thing, but the truth is, I'm on lockdown, aren't I?
Sam: Adam, you may not believe it, but dad was trying to protect you. Keeping you from all of this.Adam: Yeah well, I guess the monster that ate me didn't get that memo.
Adam Milligan was the son of John Winchester and Kate Milligan, and half-brother to Sam and Dean. In January 1990, Adam's mother met John Winchester in Windom, Minnesota when he came into the hospital where she worked as a nurse, when he was injured during a hunt. Adam was born on September 29, 1990. He didn't have any contact with John until he was twelve. After the initial meeting, he had sporadic contact with John who taught him pool and poker, took him to ball games on his birthday, bought him his first beer when he was 15 and taught him to drive in the Impala. In 2009 he was studying pre-med at the University of Wisconsin. Both Adam and his mother were killed by ghouls.
Before his resurrection, while still in Heaven occupying his own personal realm there, an angel speaking on behalf of Michael and Zachariah, approaches him and promises him that they'll revive his mother if he serves as Michael's vessel on Earth against Lucifer Later, Michael claims his body and uses it as an alternate vessel instead of Dean, due Dean's constant and frequent disputes concerning being the vessel of Michael on Earth. When Michael tries to stop Sam from throwing himself and Lucifer into Lucifer's Cage, he ends up imprisoned as well. When Dean tries to make a deal with Death to free Sam's soul and Adam, Death says he will only save one of them. Dean chooses Sam, leaving Adam trapped in the Cage with Lucifer and Michael.
Adam and his mother were killed by ghouls in revenge for the killing of their parent by John Winchester in 1990. One of the ghouls takes on Adam's form and memories in order to lure John to the town, only to find out that he has died. The ghoul then decides to kill Sam and Dean in John's place. While Dean is initially skeptical and assumes Adam is a supernatural creature, he and Sam come to believe that Adam is human and their brother. Dean is envious of the time John spent with Adam, but when he recognizes that John tried to shield Adam from hunting, he clashes with Sam who is keen to train Adam as a hunter. Dean finds the bodies of Adam and his mother in a crypt, and after killing the ghouls, insists that he is given a hunter's send off in the form of a funeral pyre similar to that given to John by his sons.
Whilst enjoying eternity in his own private Heaven (making out on his Prom night) Adam is approached by angels who offer him the opportunity to help the archangel Michael defeat Lucifer by becoming Michael's vessel. Adam accepts and is resurrected under Zachariah's supervision. He awakes beneath the ground where his funeral pyre was held and crawls to the surface to find Castiel waiting for him, the angels originally meant to greet him lying dead nearby. Castiel teleports Adam to Bobby Singer's house, much to the amazement of Sam and Dean. When he regains consciousness, Adam informs the Winchesters of his deal with the angels and his intention to say "yes" to Michael. However, Castiel engraves Enochian runes on his ribs to keep the angels from locating him. Though they are confused as to how Adam can qualify as a vessel for Michael, Castiel deduces that because Adam is of the Winchester bloodline he is eligible to contain Michael's essence, despite the prophecy that foretells Dean as the one and only candidate. However, Dean doesn't want him to share that fate and slips away.
Sam leaves Adam in Bobby's care while he searches for Dean. Meanwhile, Adam dreams of the park his mother used to take him to when he was little and is greeted by Zachariah, who convinces Adam that the Winchesters are not to be trusted and that if he cooperates with the angels he will get to see his mother again. Adam gives Zachariah his location and the angels promptly snatch him out from under Bobby's nose. They take him to the Green Room where they had imprisoned Dean and Zachariah reveals that he has been lying to Adam all along. Adam's sole purpose is to lure Dean into a position where he would have to say yes to Michael, which proves successful when the Winchesters arrive to rescue their brother. Zachariah tortures Adam and Sam until Dean agrees to becoming the vessel, but this is a ruse as Dean provokes Zachariah into letting his guard down and uses the chance to stab the him with an angel sword killing him instantly. Dean and Sam escape the room just as Michael descends but the door slams shut behind them, trapping Adam in the room with Michael's true form. Dean smashes the door open to find the room gone along with Adam and Michael.
Michael appears in Stull Cemetery to confront Lucifer, using Adam as his vessel though he tells Dean that Adam is "not home right now." Michael attempts to stop Sam from locking Lucifer back in Lucifer's Cage and denying them their battle which results in both Sam and Adam being locked in Hell alongside Lucifer and Michael.
Dean tries to make a deal with Death to retrieve both Sam's and Adam's souls from Lucifer's Cage, but Death says that Dean can only pick one. Dean picks Sam, inevitably leaving Adam trapped in the Cage with Lucifer and Michael, where he remains now.
- Adam's birthday coincides with the traditional date of the Feast of Saint Michael, or Michaelmas.
- Adam was twelve years old when he and John Winchester first made contact. Mathematically, this would be the same year Sam Winchester left home for Stanford.
- Adam was studying pre-med at the University of Wisconsin before his death in 4x19. Back when human dissection was illegal, bodysnatching became a popular means of obtaining corpses. The corpses would be sold off so med students could learn anatomy and human dissection, and a lot of the time it was the students themselves stealing the bodies from their graves. The fact that the Adam we meet is a bodysnatching ghoul in the guise of a pre-med student seems to be a small nod to this weird piece of history.