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|dates= May 18, 2017 – 2018 (dies of total systemic failure)<br>2018 – 2019 (killed by [[God]])<br>2020 (resurrected by [[Billie]])
|location= [[Lebanon, Kansas]] ([[Men of Letters Bunker|HQ]])
|occupation= [[Nephilim]]<br>[[Hunter]](formerly)<br>New God|episodes= [[12.23 All Along the Watchtower]]<br>[[13.01 Lost and Found]]<br>[[13.02 The Rising Son]]<br>[[13.03 Patience]]<br>[[13.04 The Big Empty]]<br>[[13.06 Tombstone]]<br>[[13.09 The Bad Place]]<br>[[13.14 Good Intentions]]<br>[[13.20 Unfinished Business]]<br>[[13.21 Beat the Devil]]<br>[[13.22 Exodus]]<br>[[13.23 Let the Good Times Roll]]<br>[[14.01 Stranger in a Strange Land]]<br>[[14.02 Gods and Monsters]]<br>[[14.03 The Scar]]<br>[[14.06 Optimism]]<br>[[14.07 Unhuman Nature]]<br>[[14.08 Byzantium]]<br>[[14.09 The Spear]]<br>[[14.10 Nihilism]]<br>[[14.14 Ouroboros]]<br>[[14.15 Peace of Mind]]<br>[[14.16 Don't Go in the Woods]]<br>[[14.17 Game Night]]<br>[[14.18 Absence]]<br>[[14.19 Jack in the Box]]<br>[[14.20 Moriah]]<br>[[15.09 The Trap]]<br>[[15.11 The Gamblers]]<br>[[15.12 Galaxy Brain]]<br>[[15.13 Destiny's Child]]<br>[[15.14 Last Holiday]]<br>[[15.15 Gimme Shelter]]<br>[[15.17 Unity]]<br>[[15.18 Despair]]<br>[[15.19 Inherit the Earth]]
}}
{{Quotation
|title=
|text= People don't need to pray to me or to sacrifice to me. They just need to know that I'm not already a child! part of them and to trust in that. Iwon'm t be hands on. Chuck put himself in the son of Lucifer! story. That was his mistake. But I learned from you and my mother and Castiel that… when people have to be their best, they can be… And that's what to believe in. Well, I'm a Hunter! I am a Winchester!!!really as close as this. Goodbye.
|author= Jack Kline
|source= [[1415.14 Ouroboros19 Inherit the Earth]]
}}
Following his birth, the Winchesters take him in, both to keep watch over him and to keep him from hurting anyone, while also hoping to use him to access the [[Apocalypse World]] where Mary is trapped. [[Sam]] is able to connect with him since they both know what it feels like to have a darkness inside them. Jack initially sees Castiel as his father, but when told that Castiel is dead, he became emotionally attached to Sam instead. Jack is also later able to bond with Castiel and understand why he and Kelly trusted him after he brought him back from [[the Empty]].<ref name="thirteen06">[[13.06 Tombstone]]</ref> After being slow to accept Jack, [[Dean]] eventually declares him a member of [[Team Free Will]].<ref name="thirteen06" /> This acceptance allows Jack to see the Winchesters and Castiel as his family.<ref name="thirteen09">[[13.09 The Bad Place]]</ref>
After burning off his entire [[soul]] to kill [[Michael (Apocalypse World)|Michael]],<ref name="fourteen14">[[14.14 Ouroboros]]</ref><ref name="fourteen17">[[14.17 Game Night]]</ref> Jack accidentally killed kills [[Mary Winchester]] in a [[soulless]] rage.<ref name="fourteen18">[[14.18 Absence]]</ref> Targeted Jack is targeted as a threat by the Winchesters, Dean in particular, for his acts, Jack was killed by however he ultimately can't bring himself to kill the young nephilim. After it is discovered that [[God]] when He began has been manipulating their lives as part of a sick story, including manipulating Dean to get him kill Jack, God kills Jack Himself and begins the end of the world.<ref name="fourteen20">[[14.20 Moriah]]</ref> His corpse was is subsequently possessed by the [[demon]] [[Belphegor]] during his brief time on Earth before Castiel smote smites the demon, destroying Jack's corpse.<ref name="fifteen01">[[15.01 Back and to the Future]]</ref><ref name="fifteen02">[[15.02 Raising Hell]]</ref><ref name="fifteen03">[[15.03 The Rupture]]</ref>
After spending months in [[the Empty]], Jack was is resurrected by [[Billie]] once God left the Earth. Billie provided provides Jack with a plan that would enable him to become strong enough to kill God Himself.<ref name="fifteen11">[[15.11 The Gamblers]]</ref> Initially resurrected soulless,<ref name="fifteen12">[[15.12 Galaxy Brain]]</ref> Jack's soul is subsequently restored by the [[Garden of Eden]] after he visits it through [[the Occultum]].<ref name="fifteen13">[[15.13 Destiny's Child]]</ref> After absorbing all of God's power, Jack becomes the new God himself and states that he exists in harmony with [[the Darkness]].<ref name="fifteen19">[[15.19 Inherit the Earth]]</ref> [[Bobby Singer]] later tells Dean that Jack, with Castiel's help, reshaped Heaven to be a better place, tearing down the walls keeping the souls apart, making it so that they no longer have to relive their memories for an eternity and can exist together.<ref name="fifteen20">[[15.20 Carry On]]</ref>
==Characteristics==
[[File:Jack's Eyes.png|thumb|right|350px|Jack flashes his eyes.]]
{{Quotation
|title=
|text= I'm not a child! I'm the son of Lucifer! I'm a Hunter! I am a Winchester!!!
|author= Jack Kline
|source= [[14.14 Ouroboros]]
}}
The offspring of a human and an [[archangel]], Jack Kline is believed to be more powerful than the average [[Nephilim]], as the amount of cosmic energy that went into his conception was powerful enough to be felt by all the angels in Heaven and Earth and the cosmic shock wave was even detected by the [[British Men of Letters]] and [[Donatello Redfield]]. Due to the energy coming from Jack, Donatello was able to track him, revealing that unlike his father, the energy coming off of Jack is not "dark" or "toxic." Castiel stated that he cannot imagine the power resonating within him. Unlike run-of-the-mill Nephilim who have silver eyes, Jack has gold irises with white sclerae and visible pupils. According to the lore, as Jack grows into his powers, he will become more powerful than his angelic sire, [[Lucifer]]. After Jack regains his powers, Donatello states that Jack is probably the most powerful being in the universe.<ref name="fourteen15">[[14.15 Peace of Mind]]</ref> After being locked in the [[Ma'lak Box]], Jack is able to break free, suggesting that he somehow managed to "level up" his powers.<ref name="fourteen20" /> After his second resurrection, Jack reveals that [[Billie]] has provided him with a plan that will allow Jack to become even stronger until he reaches the point where Jack is powerful enough to kill God Himself.<ref name="fifteen11" />
===Powers and abilities===
[[File:JackSmitesAngels.gif|thumb|right|350px|Jack smites three incoming angels in midair.]]
* [[Angel radio]] – Jack is able to hear the angel's communicationtelepathic communications, which also has a debilitating effect on him.<ref name="thirteen01" /><ref name="thirteen09" />
* [[Angel wings]] – Jack can use his wings to protect himself and others from attacks.<ref name="thirteen20" />
* [[Exorcism|Angelic exorcism]] – By using the power of his [[soul]] and [[Enochian]] magic, Jack was able to forcably forcibly remove [[Michael (Apocalypse World)|Michael]] from his [[vessel]] , [[Rowena]].<ref name="fourteen14" />
* [[Astral projection]] – Jack can use his powers to inspect places at a distance such as when he searched [[Michael's Fortress]].<ref name="thirteen20">[[13.20 Unfinished Business]]</ref>
* Can open [[Hell Gates]] – With enough concentration, Jack was able to open a Gate to Hell and call forth the ''[[shedim]]'' from some of the deepest caverns of Hell to the earth.<ref name="thirteen02">[[13.02 The Rising Son]]</ref>
* Celestial energy – Jack can send out a shock wave of celestial energy when provoked.<ref name="thirteen01" /><ref name="thirteen06" />
* Concealment – Jack can conceal his energy from angels and demons, preventing himself from being located.<ref name="thirteen07">[[13.07 War of the Worlds]]</ref>
* [[Enochian]] magic – By tapping into his soul to power the magic, Jack was able to keep himself alive after losing his [[grace]]. He would go on to use the Enochian magic to replicate his Nephilim abilities, such as healing and using energy blasts to attack enemies. When Jack used his soul, his pupils would light up with a bright white light, as opposed to his irises shining gold when he had his grace.
* [[Telepathy|Mental projection]] – He could send images to others, including visions.<ref name="twelve19" /><ref name="thirteen09" />* [[Resurrection]] – From the womb, Jack was able to resurrect his mother [[Kelly Kline]] after she committed suicide.<ref name="twelve19" /> However, he required Lucifer's help to resurrect [[Maggie (Apocalypse World)|Maggie]]<ref name="thirteen23" /> and has shown no conscious use of this power since his birth. Jack has also been shown to have a level of influence in [[the Empty]], as he was able to awaken Castiel from his eternal slumber by calling his name.<ref name="thirteen03">[[13.03 Patience]]</ref> After becoming the new God, he taps into his newly-found powers to revive Castiel.<ref name="fifteen20" />* [[Healing]] – From the womb, Jack was able to heal [[Kelly Kline]]'s slit wrists and massive blood loss. While empowering [[Castiel]], he also healed heals the angel's injuries from the fight with [[Dagon]] in a matter of seconds.<ref name="twelve19" /> Using the power of his soul, Jack was able to heal Castiel of the [[gorgon]] poison when the antidote failed to work.<ref name="fourteen14" /> Jack later healed heals [[Stacy]] after accidentally stabbing her with an [[angel blade]].<ref name="fourteen16">[[14.16 Don't Go in the Woods]]</ref> and heals Sam's serious head injury from [[Nick]].<ref name="fourteen17" />
[[File:Jack-Pencil.png|thumb|right|350px|Jack displays his newfound telekinesis.]]
* Illusions – While entertaining children in Apocalypse World, Jack was able to give his shadow puppets the appearance of real animal shadows.
* Interdimensional instability – His celestial energy can cause tears in the fabric of space and time, creating [[portals]] leading to [[alternate universeuniverses]]s.<ref name="twelve23">[[12.23 All Along the Watchtower]]</ref>
* Invulnerability – Jack has been shown to be impervious to guns and knives, as well as [[angel blades]].<ref name="thirteen01" /><ref name="thirteen02" /> This also extends to magic, as Jack is shown to be impervious to most spells, including an [[angel banishing sigil]], although it appears to debilitate him as it can still affect his grace.<ref name="thirteen01" /> The energy Jack emits can also hide him from tracking spells and [[scrying]].
* [[Mind control]] – Jack can compel anyone to tell the truth, even archangels.<ref name="thirteen23">[[13.23 Let the Good Times Roll]]</ref> He also compelled everyone on earth to tell the truth.<ref name="fourteen20" />* Power transference – While ''in utero'', Jack was able to temporarily lend Castiel his power to kill Dagon.<ref name="twelve19" /> After Jack's human soul fused with his Nephilim grace, he exploded into a metaphysical supernova, essentially making him capable of absorbing celestial energy from everything around him. He eventually uses this to steal Chuck's power, rendering him human as Jack becomes the new God.<ref name="fifteen19" />* Precognition – Jack appears to have the ability to see the future.<ref name="twelve19" />Ever since his birth, he hasn't displayed any conscious use of this ability.
* [[Pyrokinesis]] – When Kelly was pregnant with Jack, he was able to cause a [[Bible]] to burn when she placed her hand on it, and he incinerated Dagon when he lent his powers to Castiel. After he is born, Jack is able to leave scorched footprints on the floor.<ref name="twelve23" /> While tapping into the power of his [[soul]], Jack was able to destroy the [[Apocalypse World]] [[Michael (Apocalypse World)|Michael]] by burning him away, leaving only his grace for Jack to consume and restore his powers.<ref name="fourteen14" />
* Regeneration – Jack is able to instantly heal any wounds that are incurred.<ref name="thirteen01" /><ref name="thirteen02" /><ref name="thirteen06" /> While hiding from God, Jack is able to purposefully suppress this power so his wounds healing don't draw God's attention to him.<ref name="fifteen11" />
===Weaknesses===
* [[Archangels]] – Archangels like [[Michael (Apocalypse World)|Michael]] and [[Lucifer]] can disorient him.
* [[Archangel blade]] – An archangel blade was capable of wounding him in a weakened state and may potentially kill him.
* Electrocution – Like humans, Jack can be debilitated when electrocuted by a stun gun.<ref name="thirteen01">[[13.01 Lost and Found]]</ref>
* [[The Equalizer]] – A special hand gun created by God with the specific purpose of killing Jack (as well as anything else).* [[God]] – With just a snap of his fingers, God was able to smite Jack, however the death was not instantaneous. After absorbing pulses of Chuck's power, Jack is rendered immune to His smiting abilities.<ref name="fifteen19" />
* [[Grace Extractor|Grace extraction]] – In this state, without Jack's grace to maintain a balance, Jack's angel and human halves begin attacking each other, resulting in Jack becoming fatally ill.<ref name="fourteen07" />
* [[Ma'lak Box]] – The box was able to temporarily inhibit Jack's powers, but through extreme concentration and will power, Jack was able to escape and destroy the box.<ref name="fourteen19" /> Given that the box was capable of holding even the most powerful archangel, it would be incapable of containing Jack completely, as he would grow to become more powerful than an archangel. The Winchesters believed that Jack "leveled up" when he broke free from the box.<ref name="fourteen20" />
* Potions – Through feeding him multiple smoothies containing yarrow root and ground jawbone, [[Mrs. Butters]] was able to weaken Jack's powers.<ref name="fifteen14">[[15.14 Last Holiday]]</ref>
* [[Warding sigils]] – With strong enough warding, Jack's powers can be nullified.
Jack arrives at the farm house with lore books from the Bunker for Eliot. He begins questioning the teens about the music they are listening to and what the SATs are. When Eliot asks Jack about how demons look, he reveals to them that anyone can be possessed by a demons and that he has killed one, which prompts Max to ask how. Outside Jack shows the three an angel blade, and after multiple attempts to throw it into a tree fail, Jack uses his powers to telekinetically throw the blade and fly it around, which begins to make the others nervous. Jack assures them that they'll be fine and he is in control, but an afraid Stacy accidentally runs into the path of the flying blade, critically injuring her. As the others try and tend to her, Jack removes the blade from her gut and heals her. But the damage is done, and Max, Stacy, and Eliot want nothing to do with him anymore and leave.
Back at the Bunker, Sam and Dean come clean with Jack about their reservations regarding his powers, leading to Sam and Dean asking Jack to not use his powers without permission, which he accepts without telling them what happened while they were away.
===[[14.17 Game Night]]===
:''"I have a soul!"''
In the Bunker kitchen, Jack prepares some popcorn for game night. Mary begins questioning him about his soul, but Jack quickly tells her he is fine and annoyed by everyone asking him about it. As they go into the library, and wait for Sam to return with the pizzas, game night is interrupted by a voicemail from Donatello pleading Sam and Dean for help. Dean tells Jack to stay behind for Sam while he and Mary go to Donatello's home to see what happened. When Sam returns, he and Jack begin trying to decipher the language Donatello is speaking in his message, which is a bible verse in ancient Hebrew.
Dean and Mary return to the Bunker with Nick in tow. During their interrogation, Nick wishes to talk with Jack in exchange for Donatello's location. Mary and Dean are against it, but Jack is willing as he wants to help Donatello and with Sam's support he goes to speak with Nick in the dungeon. Nick tells Jack about how much Lucifer actually did love him, and soon begins to egg him on about not having a soul anymore. This angers Jack, bringing him closer to Nick, allowing Nick to headbutt him and cause Jack to bleed. After healing himself, Jack approaches Nick with menace and soon emerges, telling the Winchesters that Nick will take them to Donatello's location.
Using Jack's blood for a spell to resurrect Lucifer from the Empty, Jack's blood begins to burn, and with Mary's permission he uses his powers to teleport them to Nick's location. Arriving just as Lucifer is about to reunite with Nick, Jack banishes his father back to the Empty and turns his attention to Nick, violently breaking Nick's hand before causing Nick to burn from the inside out, killing him. The brutality of Nick's death shocks Mary, who tells Jack to go help the injured Sam. After healing Sam of his head injury, he returns to the cabin to find Mary outside. He attempts to explain why he killed Nick, but Mary tells him that something is wrong with him, and that she, Sams Sam, and Dean will help. Jack refuses to listen to Mary, and begins hearing noises in his head, screaming to be left alone as Mary continues to try to understand what's wrong. He screams at Mary one last time to be left alone. The screen goes dark and Jack whispers "Mary?".
[[File:MagiceNecromantiorum-1.png|350px|thumb|right|Jack performs the spell to resurrect Mary.]]
Dumah then has Jack take her to Heaven, where she tells Jack that they are in dire need of more angels. While Jack can't create them out of thin air, he can forge angels from human souls. Dumah brings him to [[Heaven's Throne Room]], telling Jack it is where his grandfather received prayers and tells him to listen for any people willing to become angels. Jack proceeds to sit on the throne, and begins to hear various prayers, eventually picking up on a church group. He teleports to the church where the meeting is taking place and offers the members if they wish to become angels, unfurling his wings to their awe. When the church pastor, Ames, enters he finds the members sitting frozen and unresponsive. When Jack tells him he is taking them to Heaven to become angels, Ames doesn't believe him and demands he leave his church. But Jack, believing Ames is interfering in Heaven's work inflicts him with a biblical curse, causing worms to writhe from cuts all over his body before teleporting himself and the church group away.
In Heaven Jack proceeds to forge the humans he has chosen into angels, when he is surprised by the sudden arrival of Castiel and happily tells him he is making angels. As Castiel steals Dumah away into the hall, Jack hears a prayer from Sam inviting him back home. When Jack teleports back to the Bunker, he attempts to explain that the "incident" what happened with Mary was an accident. Jack referring to it as an "incidentaccident" visibly angers Dean, who is able to hold his rage back. They tell Jack they forgive and tell him they are close to find a solution to fix his soul, but they need to keep him safe from everyone by placing him in the [[Ma'lak Box]]. Jack agrees and once inside the box, Dean locks him and he and Sam leave Jack in the box in a locked room.
Inside the box, Jack begins calling for Sam and Dean, his calls eventually turn to panic, leading to the appearance of Lucifer, telling Jack he has been played by Sam and Dean, and that they have locked him away for the rest of time. Angry, Jack begins tapping into his powers, causing the box to shake and eventually explode, causing alarms to go off in the Bunker. When Sam, Dean and Castiel arrive in the storage room, they find the Ma'lak Box destroyed and Jack appearing out of the smoke, eyes glowing gold.
[[File:JackKilled.png|thumb|right|350px|Jack is killed by Chuck.]]
When Dean arrives with [[the Equalizer]] to kill Jack, Jack refuses to run and flings Castiel aside so that he won't get hurt. Jack kneels on the ground before Dean and expresses understanding for what Dean is about to do, stating that he knows what he has done and that Dean has been right all along and Jack is about him being a monster. However, Dean can't bring himself to kill Jack and instead throws away the gun. [[Chuck]] demands that Dean kill Jack and Sam realizes that Chuck has been playing them all along. Even though Chuck offers to bring back Mary if Dean kills Jack, Dean refuses, knowing that Mary would never want that. With the Winchesters continuing to refuse to cooperate, Chuck snaps his fingers and [[smiting|smites]] Jack, leaving Jack with his eyes burned out and surrounded by the imprint of his wings. In retaliation, Sam shoots Chuck 's shoulder with [[the Equalizer]]. Devastated, Sam, Dean, and Castiel stand over Jack's body before Chuck raises the [[soul]]s of [[Hell]] to attack themand end the world.
After being killed, Jack awakens in [[the Empty]]. He is greeted there by the [[Cosmic Entity]], who appears to Jack in the form of a black, viscous humanoid. The entity forms a smile on its face at the sight of Jack, who asks what had happened. [[Billie]] appears behind Jack and tells him that they should talk about that.
As Jack looks around [[the Empty]], [[Billie]] appears behind him to announce that "it's time."
[[File: Jack Grigori Heart.png|thumb|left|350px|Jack consumes Sariel's heart.]]
===[[15.11 The Gamblers]]===
:''"The hearts. They were just the beginning. They made me strong, but I'm not strong enough. If I do exactly what she says, if I follow her plan, then I'll get stronger and... I'll be able to kill God."''
Castiel receives a call on Dean's cell phone from a sheriff reporting a sighting of Jack in Cushing, Oklahoma. He watches video footage from the crime scene showing a resurrected Jack attacking and killing a doctor in his office and eating his heart. When Castiel goes to investigate, he finds an [[angel sword]] in the doctor's medicine cabinet, revealing Dr. Sariel's true nature as a [[grigori]].
Jack manages to locate another grigori, [[Kabaiel]]. He follows him to a warehouse, but he ends up getting captured and taken to a an old church. Kabaiel tortures Jack for information on why he's targeting them, but Jack doesn't answer or use his powers. While he's torturing Jack, he says that Sariel was killed for feeding off the souls of his patients and Kabaiel is being targeted for feeding off children. When Kabaiel asks how Jack knows, he says Death told him. Castiel makes his way to the church and battles the grigori and manages to kill him. Castiel releases Jack and hugs himbefore taking him back to the Bunker.
When Sam and Dean return from Alaska, Castiel and Jack are waiting for them in the library. They explain that [[Billie]] has been keeping Jack hidden in [[the Empty]] until God left at which point it was safe for her to resurrect Jack. He hasn't been using his powers because he knows that Chuck will be able to find him and kill him again if he does. It's revealed that Jack has been killing the last of the grigori and consuming their hearts as part of Billie's plan to help make Jack strong enough to kill [[God]].
===[[15.12 Galaxy Brain]]===
:''"Okay. I'll do it. Everything she asks."''
While Sam, Dean, and Castiel talk about how Jack is going to kill God, Jack walks by the library and looks at [[Sam and Dean's Initials|Mary's Initials]] on the table. The reaper [[Merle]] appears in his room and they talk about why Billie hasn't been returning his prayers and Merle convinces him to keep following her rules. Sam shows up when he overhears part of their conversation and tells Jack that they're glad he's back.
Castiel talks about how he and [[Kelly Kline|Kelly]] knew that Jack would be good for the world, and when Chuck killed him, he knew that Jack's story wasn't done. Dean agrees that it's best for Jack to kill Chuck and fulfill his destiny. However, they get sidetracked when they get a call from Jody saying she's been kidnapped.
Castiel and Jack are playing Connect Four when Sam and Dean return with [[Jody]] and [[Dark Kaia]]. She reveals that [[Kaia Nieves]] is alive in [[The Bad Place]] and they start looking for a way to reopen the rift without using Jack's powers or grace. Their search only uncovers a spell that requires the liver of a mandragora, which became extinct years ago when [[John]] killed the last one on in a hunt in Fargo. Later, Jack overhears Jody and Castiel's conversation about [[Claire]] searching for revenge for two years for Kaia's presumed death. He visits Dark Kaia, who initially acts coldly towards him, but he says he wanted to help her since she was in pain over her powers. Dark Kaia tells him that she wanted to come to Kaia's world because it looked peaceful, but she doesn't know where she belongs in the world and pleads for his help to take her back. Jack agrees to dreamwalk with Dark Kaia to check in on her.
Jack tells Sam and Dean that he used his powers, but Merle interrupts before the conversation can continue. She threatens to tell Billie if he uses his powers again, but Jack dares her to go and says he'll use his powers anyway. She threatens to stop him, but Jack is unafraid and tells her that she could either deal with whatever Billie does to her for failing or help them find the best way to open the rift so she never has to know. Merle reveals that the cosmic-level warding used in the Bunker was weakened when Amara invaded. She agrees to help restore it for a time, but she needs Castiel to help power it up. When they restore the Bunker's warding, Jack opens the rift to the Bad Place and Sam and Dean travel through with Dark Kaia. They manage to retrieve Kaia, but Dark Kaia stays behind, choosing to die with her world.
Kaia puts on some of Jack's clothes and leaves with Jody, eager to see Claire again. When the Winchesters thank Merle for her help, she is abruptly killed by Billie for disobeying her orders. She scolds Jack for breaking the rules so soon after his resurrection and explains that they're playing a big game and she sees the big picture. She explains that when Castiel killed her, she inherited Death's collective knowledge and his library. In the library, everyone has a book detailing how they die, even God. She explains that in order to create other worlds, Chuck had to integrate Himself into the multiversal quantum construct to make sure the Winchesters' world kept operating in His extended absence. He, in turn, created His greatest weakness: that He would one day die like everything else. Billie reveals that [[Team Free Will 2.0]] are the messengers of God's inevitable death.
[[File:TheSerpent.jpg|thumb|right|350px|Jack is confronted by a serpent.]]
===[[15.13 Destiny's Child]]===
:''"Why didn't I get it? I mean, my mother died, too. Why didn't I understand? It was my fault. (…) Please. Just please forgive me."''
After an alternate Sam and Dean briefly appear in the bunker, [[Billie]] visits to explain that God is almost done destroying worlds and will soon turn His attention to theirs. Billie now has the next step for Jack: while eating angel hearts strengthened his body, Jack needs to find [[the Occultum]], which she states is more spiritual in nature. However, Billie doesn't know where to find it as it has been hidden and missing for centuries. Billie refuses to expand upon what it does beyond the Occultum being powerful and potent and not a weapon ''per se''. Jack confirms that he is ready, pleasing Billi,e who states that they must be ready, vigilant, and not stupid as God must not catch on to what they are doing.
As Sam and Dean go through the lore, trying to figure out where the Occultum is and more specifics of Death's plan, Jack enters, having just figured out how to blow a bubblegum bubble. Sam and Dean try to get more specifics out of Jack for how he will kill God when the time comes, but he clearly doesn't know. [[Castiel]] enters, having learned information from [[Sergei]] that points to [[Sister Jo]] having the Occultum. While the Winchesters are gone, Jack enjoys a buffet of fast food, though he admits that his soulless state keeps him from enjoying the things in life. While he can understand emotion and why he felt it, he still can't feel himself and can only understand why the Winchesters are angry about the death of [[Mary Winchester]]. Recognizing that Dean is still angry with him, Jack questions if Dean will ever forgive him and Castiel suggests that with time it's possible.
After the Winchesters travel into [[Hell]] to find where [[Ruby]] hid the Occultum, a suspicious Castiel asks Jack to mostly kill him by draining most of Castiel's lifeforce so that Castiel can go to [[the Empty]] to talk to Ruby. Jack expresses concern about Castiel's plan, particularly as the [[Cosmic Entity]] doesn't like him, and he expresses concern that he may screw up in his soulless state. Castiel expresses confidence in Jack and warns Jack that he must continue to feed Sam's spell so that the boys won't be trapped in Hell. Jack reluctantly agrees to give Castiel an hour before bringing him back and draws Castiel's lifeforce into a flask. After returning from Hell, having learned that Jo set them up, the Winchesters are furious to learn of what occurred and order Jack to immediately bring Castiel back. Jack returns Castiel's lifeforce to him, reviving Castiel as the Cosmic Entity tortures him. Castiel reveals that he learned the Occultum's location from Ruby, pleasing everyone. However, Jack expresses worry about Chuck checking in on them, so the Winchesters bring in their alternate selves to pose as them in case Chuck visits.
Reaching the church indicated by Ruby, Jack notes that it all seems too easy before they are ambushed by two [[hellhounds]]. Barricading themselves inside the church, the four search for the Occultum, eventually finding an orb beneath the floorboards with engravings in [[Enochian]] which state that "in order to be in the Occultum, the Occultum must be in you." As the others argue about what to do, Jack swallows the orb and is transported away in a flash of light. Awakening in a garden, Jack is greeted by a young girl who recognizes that Jack must not be human to have made it there. The girl tells Jack that he is in the [[Garden of Eden]] which he recognizes from the story of Adam and Eve. The girl confirms this, stating that God banished Adam and Eve and all of mankind from the Garden and hid it away. Jack asks about the fact that the Garden is supposed to change him somehow and the girl confirms that it will if he was the one meant to find it and that he will know soon enough, before disappearing. As Jack looks around, a snake appears in a nearby tree, questioning who Jack really is and who he is meant to be. Holding his head, Jack experiences flashes of his life before collapsing to the ground in tears. Jack returns to the church in the form of an orb shortly thereafter, his return destroying the hellhounds as they break in.
After returning to the bunker and sending their alternate selves away, the Winchesters are told by Castiel that Jack has changed and he is the first being to visit the Garden of Eden since the exile of humanity. To their surprise, Sam and Dean find Jack crying in the kitchen where he expresses horror over his prior inability to understand that Mary's death was his fault, and Jack begs for Sam and Dean's forgiveness. As the Winchesters stare at Jack in shock, Castiel explains that Jack's soul has been restored.
[[File:Jack-Dying.png|thumb|350px|right|A chain reaction begins in Jack's body.]]
===[[15.14 Last Holiday]]===
:''"I know. It’s just… I’m supposed to kill God and I got… She got me. Because I was stupid and… Sam, do you really think I can do this?"''
===[[15.15 Gimme Shelter]]===
:''"They won't understand. But I know… this is the only way they'll ever forgive me."''
===[[15.16 Drag Me Away (From You)]]===
Billie reveals to Dean that Chuck has returned and has given Jack his final instructions. When Dean questions how Billie talked Jack into killing himself, Billie tells Dean she told Jack the truth: That the only way Dean can forgive him for killing Mary is by sacrificing himself to kill Chuck.
===[[15.17 Unity]]===
:''"You don't have to say anything. And… you don't need to be sorry. I'm not like Sam or Cas. I… I understand."''
===[[15.18 Despair]]===
:''"I feel… strange. I don't know if that's because of what happened to me, if it means something, or if I just feel strange because… it's over. The plan. My destiny. I was ready to die and, I wanted to, for Sam, for Dean, for the world. I wanted to make things right, and now… I don't know why I'm even here."''
===[[15.19 Inherit the Earth]]===
:''" I'm me. But I know what you mean."''
===[[15.20 Carry On]]===
After Dean arrives in [[Heaven]], he is greeted by [[Bobby Singer]] much to Dean's surprise as Bobby has been locked up in Heaven's prison ever since he helped to bust out [[Metatron]]. Bobby explains that before Jack went off to "wherever," he released Bobby from prison and "set some things right," reshaping Heaven with Castiel's help after bringing him back from [[the Empty]]. Thanks to Jack, the souls of Heaven are no longer forced to relive their memories for eternity and the walls separating them have been torn down, allowing the souls to exist together. Bobby calls it what Heaven is supposed to be.
==Trivia==
