Changes

Alastair was charged with breaking the first of [[the 66 Seals]] by forcing "The the Righteous Man" to torture other [[soul]]s in Hell. He first attempted to break this seal by torturing [[John Winchester]]'s soul from 2006 to 2007, promising to stop only if John agrees to torture other souls. However, John continually refuses the offer for 100 years (10 months) and eventually escaped Alastair's clutches through the [[Devil's Gate in Wyoming]].<ref name="four16">[[4.16 On the Head of a Pin]]</ref><ref name="two22">[[2.22 All Hell Breaks Loose: Part Two]]</ref> A year later, Alastair receives received John's son [[Dean Winchester]] from Lilith as a replacement for John.<ref name="four16" /> Although Alastair expected similar resistance from Dean that he got from John, he succeeded in getting Dean to agree to the offer in 30 years (3 months). Once Dean breaks broke the first seal, this allowed the rest of the seals to be broken.<ref name="four16" /> Impressed by Dean's potential, Alastair keeps kept training him as an apprentice until an army of [[angels]] rescued Dean, including [[Castiel]] who personally pulled him outof Hell.<ref name="four09">[[4.09 I Know What You Did Last Summer]]</ref> Alastair is then sent to Earth to capture and interrogate [[Anna Milton]] on what she hears other angels saying. However, he failed due to the combined efforts of [[Sam]], Dean, Ruby, and Anna herself.<ref name="four10" /> He is sent back up to Earth once again to participate in breaking more seals. His attempt to sacrifice two [[reapers]] during the winter solstice is thwarted by Sam, Dean, and Castiel,<ref name="four15" /> the last of whom captured Alastair to interrogate him on who has been killing members of his [[angel garrison]].<ref name="four16" /> Alastair proved too strong-willed for the angels to break and they call Dean in to torture his old tormentor, but to no avail. Alastair only gives up the information when Sam tortured him with his [[demon blood]]-enhanced powers; after Alastair reveals that he only knows that no demons are behind the murders, he becomes the first demon killed by Sam's growing powers.<ref name="four16" />

* [[Telekinesis]] – Alastair can moves anything with a thought. The power also extends to being able to telekinetically inflict damage onto humanshuman's hearts with a gesture.<ref name="four09" /><ref name="four10" /><ref name="four15" />

* Superhuman strength and durability – Alastair could overpower [[angels]],<ref name="four10" /> though he did not possess the power to kill them and could be overpowered sufficiently distracted, but had also shown to resistant to the smiting powers of [[angel]]s, though their [[grace]] could destroy his [[meatsuit]].<ref name="four10" /><ref name="four16" /><ref name="four15" /> His durability also extended to a high resistance to the [[demon-killing knife]].<ref name="four09" /> As Alastair survived being twists and carves into the stomach through the gut, the [[white-eyed demon]] might to have been truly immune to the knife's demon killing abilities since other demons are killed by this.<ref name="four16" />

* [[Holy water]] – Holy water has an affect on Alastair like most demons, however he was shown able to burn Alastair weaker and didn't burned his skin like regular shrug off the effects quicker than typical demons.<ref name="four16" />* [[Salt]] – ingestion Ingestion of salt mixed with holy water was able to cause great discomfort, but didn't broken his will and he has a greater recovered than regular demons.

Alastair leaves [[Hell]] and [[Possession|possesses]] a pediatrician to capture and interrogate [[AnnaMilton]]. He follows [[Sam]] and [[Dean]] from Anna's house to her father's church, where she fled to after her escape. [[Ruby]] tries to get Sam, Dean, and Anna to leave as quickly as possible to avoid Alastair, but realizes that it is too late when signs of his approach break out, including a statue of the virgin Mary weeping blood. Although she convinces Sam to [[exorcise]] Alastair with his powers, they have little effect on Alastair, who uses [[telekinesis]] to fling Sam down the staircase before attacking and beating Dean. He taunts Dean about their "closeness" in Hell, prompting Dean to finally recognize Alastair, even in his [[meatsuit]]. Sam returns to stab Alastair in the shoulder with [[Ruby's knife]], but much to the Winchesters' horror, the [[demon]] is undeterred by the knife wound. As Alastair pulls the knife out, Sam and Dean flee from him by jumping out the church window and he allows them to escape so that he can use them to lead him to Anna again.

Alastair is described by [[Ruby]] as a master torturer who is "practically the Grand Inquisitor" in [[Hell]], whom she is more scared of than even the [[angels]]. After her suggestion to abandon [[Anna]] and run from Alastair gets rejected, she tries to get [[Sam]] to resume drinking her [[Demon blood|blood]] so that he can successfully [[exorcise]] Alastair. Sam refuses this as well. Later on, Alastair reappears when Ruby leaves to fulfill her part in Sam's plan, burning her [[hex bag]] and letting Alastair find her at a [[crossroads]]. Alastair derides her, a fellow [[demon]], for protecting Anna, an [[angel]] (albeit without her [[grace]]), and rejects her offer to trade him Anna for the safety of herself, Sam, and [[Dean]]. He just Alastair insults her again before having his minions capture her and he begins torturing for him to torture her with [[Ruby's knife|her own knife]] to simply make her tell him where Anna is. While torturing her, Alastair reveals that he actually vastly prefers Hell to Earth (which he loathes), having only left it because he must deal with "this ghastly angel business." Eventually, Ruby agrees to lead him and his minions to Anna - she is unwilling to simply tell him what he wants to know because she knows that he would just kill her afterwards. Alastair and his minions accompany her and find that [[Castiel]] and [[Uriel]] are also at the site, about to execute Anna. Contrary to the terror other [[demons]] showed of angels, Alastair dismisses Castiel's warnings that they will be killed if they do not leave and even trades insults with Uriel before leading his forces to fight the angels and stop them from killing Anna so that he may capture and torture her. Although his minions are quickly killed by Uriel, Alastair proves too powerful for Castiel to smite and overpowers the angel, which shocks the latter. When Dean hits him over the head with a crowbar, Alastair shifts his attentions to him and Sam and launches a [[Telekinesis|telekinetic]] attack on their hearts while chastising Dean about his lost "potential." He tries to intervene when he sees Anna regain her [[grace]], only to get his meatsuit vaporized instead, leaving behind only Ruby's knife. Later, Dean tearfully reveals to Sam that after every day of torture in Hell, Alastair would offer to stop if Dean agreed to torture other souls. Although Dean held out for the first thirty years (three months on Earth), he eventually gave in because he couldn't take it anymore and spent the last ten years of his time there (one month on Earth) torturing other souls under Alastair's instruction.

Alastair is once again made to leave [[Hell]] and assist in starting the [[Apocalypse]], much to his dissatisfaction. Now in a new [[meatsuit]], he is attempting to break one of [[the 66 Seals]] by killing two [[reaper]]s under a solstice moon. He confronts [[Dean]] and [[Sam]] in a cemetery, revealing that he had survived his encounter with [[Anna]], though the pediatrician he had been [[possessing]] did not, and gloating that the latter's wife is still looking for her husband and unaware he is dead, which he finds hilarious. Trying again to kill them, Alastair telekinetically throws Dean into a gravestone and injures him, but finds that Sam is now immune to his powers. He flees when Sam tries to [[exorcise]] him with his powers, and later returns in yet another meatsuit. When the boys become non-corporeal to better find the demons holding the reapers hostage, they track Alastair down at a funeral home warded in [[Enochian]] script against [[angels]]. As they have made themselves subject to [[ghost]]ly weaknesses in their spiritual state, Alastair traps them with an [[iron]] chain and toys with them by shooting them with rock [[salt]] as he sends a minion to kill their unconscious bodies. While their ally [[Pamela Barnes]] is able to hold off Alastair's servant for a time and thwart this aspect of Alastair's plan, she is fatally wounded by Alastair's servant in the process and later dies. Meanwhile, Alastair begins breaking the seal and succeeds in killing one [[reaper]] with [[Death's scythe]], though the boys help [[Tessa]] escape and ultimately save the seal before fleeing. Alastair later tracks Dean down alone as Sam is fighting off Alastair's minion in an attempt to save Pamela. As he begins closing in on Dean, Alastair is struck by lightning and vanishes again as he is captured by [[Castiel]].

Alastair has held Held captive by [[Castiel]] and [[Uriel]] and imprisoned in a am [[Enochian]] [[devil's trap]] since the previous episode, but he Alastair refuses to tell them anything about the slain [[angel]]s. [[Dean]] is recruited as an interrogator because he was due to formerly being Alastair's student during his time in [[Hell]]. Amused by the idea, Alastair taunts him Dean over the course of the torture session, though he concedes that reality is "too concrete" compared to Hell for Dean to adequately torture him. Dean instead tortures Alastair with [[holy water]] injected into his veins, [[salt]] poured down his mouth, and mutilation from [[Ruby's knife]], as that he admits to an unnerved Alastair he'd dreamed of doing in Hellcoats with holy water and salt. Instead of giving Dean the information he asks for regarding the angel murders, Alastair messes plays mind games with Dean by claiming that he tortured Dean's father [[John]] in Hell and even made him the same offer he'd made Dean, but that unlike his son, John was a "hero" who steadfastly refused and ultimately escaped after 100 years (ten months on Earth) of Alastair's torture. Alastair gloats that when Dean accepted the offer in 30 years (30 3 months) and began torturing souls, he broke the first of [[the 66 Seals]] and enabled [[demons]] to begin breaking the rest of them.  Having kept an eye on the devil's trap he's caught in being compromised -- later revealed to be Uriel's doing, to let Alastair kill Dean and escape to make the angels keep thinking the demons are responsible for the angel murders Uriel committed -- Alastair escapes when a devastated Dean turns his back, then begins savagely beating Dean again. He As he is about to finish Dean off and send him back to Hell, telling him he has a lot to learn, when he becomes distracted by Castiel intervening.

Castiel embeds Ruby's knife in Alastair's shoulder and uses telekinesis to twist the blade, but Alastair simply pulls the knife out and fights Castiel. He again overpowers Castiel and while he is unable to kill the angel as he admits he wishes he could, he reveals that all he can do is send him back to [[Heaven]]. Alastair begins an angel [[exorcism]], but he is stopped by [[Sam]], who has become strong enough through his consumption of [[Ruby]]'s [[demon blood]] to overpower him with ease. Agonized by Sam's psychic torture, Alastair finally reveals that he knows none of the demons, including himself and [[Lilith]], are responsible for the angel deaths. Knowing that Sam can psychically [[exorcise]] demons, he challenges Sam to exorcise him back to Hell, where he wants to be, but is shocked when Sam instead uses his enhanced power to kill him.

Alastair's death is brought up by [[Dean]], who reveals that [[Castiel]] has told him about [[Sam]] using his powers to torture and kill Alastair with ease. Dean thinks that Sam being able to do so is another sign that he is going [[dark-side]].

Alastair is again mentioned by [[Dean]], who is in disbelief that [[Sam]]'s powers were strong enough to kill Alastair but are now not even strong enough to kill a low-level [[demon]]. The reason, unknown to Dean at the time, is that Sam has not recently fed on [[demon blood]] due to a prolonged absence from [[Ruby]].

While undergoing forced withdrawal from [[demon blood]], [[Sam]] has several hallucinations, the first of which is Alastair inexplicably returning in his last [[meatsuit]]. Finding Sam locked in [[Bobby's Panic Room]] alone with him, Alastair tortures him with a knife. Eventually Alastair disappears and Sam realizes that he had been hallucinating both Alastair and the torture.

Alastair is the only [[demon]] explicitly mentioned by [[Ruby]] when she is explaining that none of the others besides herself and [[Lilith]] had known of her undercover mission for [[Lucifer]] and Lilith.

To prove that she is capable of making [[Crowley]] give into her demands, [[Meg]] reveals that she had apprenticed under Alastair in [[Hell]] like [[Dean]] had, and Dean grudgingly concedes that this means she can make Crowley do whatever she wants. Meg doesn't reveal when she undertook this apprenticeship, but it must have been before Alastair's capture in [[4.15 Death Takes a Holiday]], as he was killed in [[4.16 On the Head of a Pin|the following episode]]. She is known to have been in Hell in the time between her [[exorcism]] in [[1.22 Devil's Trap]] and her return for revenge against the Winchesters in [[2.14 Born Under a Bad Sign]]; if his words in [[4.16 On the Head of a Pin]] were true, he would have also been working on torturing and trying to tempt [[John]]'s [[soul]] at the time. Alternately, Alastair may have taught her previously in Hell at some point [[pre-series]].

Alastair is mentioned by [[Crowley]] when listing off those who underestimated the threat the Winchesters pose and paid the price for it, along with [[Lucifer]], [[Michael]], [[Lilith]], and [[Azazel]].

[[Belphegor]] mentions Dean's time in Hell, where he was tortured by Alastair, until after for 30 years until Dean accepted Alastair's deal that he would stop the torture if Dean himself would take his place. Belphegor says tells Dean he got to watch Dean him "work" and describes described the things he did to people as not torture but "art," calling himself a fan of Dean's work. Dean simply states that it was a long time ago.