The Tok'ra Apocalypse series by San Antonio Rose
is a significant crossover between the Stargate franchise and Supernatural. Starting when Dean and Sam discovered the hotel attended by various gods, this series puts a spin on those events by establishing that the "convention" was attended by a mixture of true gods and Goa'uld from a parallel universe, who had captured two Asgard in the process. Having become Tok'ra to better infiltrate the meeting before Lucifer arrives, Dean and Sam find themselves with a whole new set of allies as the SGC join them in their goal to stop the Apocalypse, leading to such events as the Winchesters relocating to Atlantis, the re-establishment of the Men of Letters, and a war that brings together the mythologies of both series in a very well thought-out manner.
This series consists of four significant storylines and two one-shots; in order, they are Snakeheads, If Wishes Were Horsemen, For Love is as Strong as Death, Your Planet is Weird, Sufficiently Advanced Technology and Stole Soul Picnic.
The series can also be found in full here.
Tok'ra Apocalypse provides examples of:
- Adaptational Heroism: In the loosest sense of the word; Raphael is still anti-human, but the still-living Gabriel is able to convince him to stand down his plans to continue the Apocalypse, and the archangel even agrees to put some angels in regular contact with the SGC.
- Ascended Extra: Chuck Campbell just operates the Stargate in the show, but in his capacity as a distant relative of the Winchesters' through the Campbell family, when the Winchesters need to talk with that side of the family while keeping their current status discreet, Chuck serves as their contact by talking to Gwen to get the lay of the land.
- Babies Ever After: Josie becomes pregnant with Henry's child, with even Dean coming to appreciate the new family being formed despite being simultaneously freaked out at the idea that he and Sam will have an uncle who's younger than them.
- Batman Gambit: In Stole Soul Picnic, the SGC and the Hunters manage to trick Abaddon and Eva into fighting each other by playing on their shared arrogance.
- The Bus Came Back:
- Gabriel recruits assistance from Heaven in making the final attack on Niveus Pharmaceuticals to prevent the distribution of the Croatoan virus, with this aid including deceased characters from both series; NID agent Malcolm Barrett is particularly surprised to see the ghost of General George Hammond at one point.
- A few years after the Apocalypse, Dean and Sam are reunited with Dishon and Salim.
- The Nox actually take part in the plans to defend the galaxy from the demons.
- But for Me, It Was Tuesday: Time travel is still a strange situation, but the SGC are fairly nonchalant about that as an explanation for Henry Winchester's presence after he appears in Dean and Sam's room in the SGC through their closet.
- Call-Back: Daniel convinces Henry to share the secrets of the Men of Letters by recalling the insight he received from Ernest Littlefield about knowledge only being valuable if it can be shared.
- Canon Welding:
- The Goa'uld tend to impersonate dead true gods, as observed by Gabriel.
- Ernest Littlefield was a member of the Men of Letters.
- The Men of Letters Legacies' members were linked to the Ancients.
- All the monsters of Supernatural were created by a renegade Ancient scientist, whose work became so dangerous that God created Purgatory just to keep them contained.
- Composite Character: It is revealed that James Haggerty, of the Men of Letters, was actually the Ancient Janus, who returned to human form and left Ancient technology in the Men of Letters bunker.
- Crossover Relatives:
- Brady Mitchell is one of Cameron's cousins, although as Brady has been possessed for so long Mitchell accepts Sam's apologetic explanation that his cousin would be dead even if they exorcise him, later assuring his aunt that Brady wasn't a willing part of the corruption at Niveus that is used to justify its destruction.
- Chuck Campbell, Atlantis's regular gate technician, is a distant relative of the Winchesters on their mother's side.
- Death by Adaptation:
- Crowley is killed by Gabriel and Teal'c after "helping" the Winchesters capture Brady.
- Meg is killed off-screen when she attempts to take part in an attack on Sioux Falls to capture Bobby and is 'intercepted' by Gabriel.
- Deus ex Machina: Apparently Purgatory was created by God to contain the experiments of an Ancient scientist.
- On a more drastic note, the invasion of a potential Icarus-style planet by the Lucian Alliance and their demon allies is only thwarted when Gabriel orders the SGC's allies to evacuate the planet before dialling a Stargate near a black hole and dropping the planet's active gate into the sun.
- Elite Mook: Josie reveals that Abaddon was hired by Zachariah.
- Enemy Mine: The Atlantis Expedition warns the Wraith about the threat posed by the demons as well as their more official allies such as the Jaffa or the Nox, although the Vanir pay no attention to their efforts and the Lucian Alliance actually works with the demons.
- Evil Plan: Abaddon was hired to attack the Men of Letters by Zachariah, thus ensuring that John Winchester would grow up and raise his sons in the manner depicted in the show so that they could become the vessels for Michael and Lucifer.
- Exact Words: When Crowley wonders if "Murray" is a hunter, Teal'c states that he has spent many years destroying false gods, and has hunted Wraith and other creatures that threatened Earth; all true, but not in the sense that Crowley would expect.
- Fate Worse than Death: Not entirely, as the Wraith would have to die to experience it, but Sam convinces a Wraith Queen of the dangers of demons by making her experience his own memories of his time in Hell.
- "Freaky Friday" Flip: A particularly strange curse in Pegasus causes Dean and Sam to briefly swap bodies with John Sheppard and Rodney McKay respectively.
- Gender Bender: Downplayed; while stopping a demon-possessed scientist travelling to Destiny, Bobby Singer triggers the stone and arrives on Destiny in the body of Chloe Armstrong. However, aside from TJ musing that Chloe is "probably freaking out right now" and Bobby warning the boys not to talk about it once he gets back to his body, Bobby's visit to Destiny is focused instead on warning the crew how to protect themselves from potential demonic incursion, with no sign that he's really paying attention to his new body.
- Hive Mind: Demonstrated when a Wraith Queen uses her telepathy to induce her entire hive-ship to perform an exorcism simultaneously.
- Ignorant of Their Own Ignorance: Introducing the SGC to the Winchesters and the supernatural to the SGC puts both of their respective enemies in this kind of situation, as even Abaddon only recognises the Stargate as the chappa'ai without knowing what the SGC have achieved, while the Genii are caught off guard when an angel calls Ladon out for condoning the plan to essentially "exile" Atlantis from the Coalition.
- Inexplicably Identical Individuals: The fact that Rob ("99 Problems"), Samuel Campbell and Josie Mills look exactly like Daniel Jackson, Steven Caldwell and T.J. Johannsen is just treated as a strange coincidence, as is Todd's vague resemblance to Alastair's last host (basically an Actor Allusion as the relevant characters were played by the same actor).
- Jerkass Realization: Even after Gabriel returns to Heaven, it takes witnessing a demon invasion of an Icarus-class planet escalate to the point where the only chance of victory is Gabriel dialling a black hole and dropping the Stargate in the sun for Raphael to realise the full consequences of his desire to still trigger the Apocalypse.
- Jumped at the Call: Dean still calls Henry out on travelling through time and abandoning his son, but accepts Henry's counter-argument that it was do that or get killed by Abaddon.
- Kneel Before Frodo: While nobody actually kneels to Sam and Dean, Teal'c states at one point that they "deserve greater honour than any human can bestow" after their actions protected two whole galaxies from the forces of Heaven and Hell. When General Hammond meets John Winchester in Heaven, he assures John that the other man has no need to salute given how the SGC owes John so much for teaching his sons the lessons they have shared with Hammond's old colleagues.
- Let's You and Him Fight: The SGC and the Men of Letters deal with the threats of Abaddon and Eva by tricking the two sides into going after each other until only the leaders are left, culminating in a final showdown on the higher planes that neither of them can win.
- Magical Library: The Men of Letters bunker, which also includes some information about the Ancients, due to Janus joining the Men of Letters after he returned to human form.
- My God, What Have I Done?: Raphael has a moment of this when Gabriel is forced to destroy an entire planet to stop the demon-controlled Lucian Alliance getting control of an Icarus-style planet, forcing Raphael to face the scale of death that will result if the Apocalypse takes place.
- Noodle Incident: Gabriel muses that the SGC missed Lucifer's release because they were busy trying to get Atlantis back to Pegasus.
- Parental Substitute:
- Not explicitly acknowledged, but Dean awkwardly compares Sam Carter to Mary Winchester.
- Downplayed for Sam, as his subtle telepathic abilities give him a connection to Torren that he uses to reassure the boy when Teyla can't do it herself.
- Posthumous Character: During the assault on Niveus Pharmaceuticals, Gabriel is able to recruit some aid from Heaven in the form of most of the deceased characters from both shows, going all the way back to Charles Feretti and Pamela Barnes. When the time comes for the final confrontation between Abaddon and Menva, it is presented as George Hammond watching it on a television in the Roadhouse with John and Mary Winchester, along with other deceased allies.
- Put on the Bus:
- As far as the general population is concerned, Sam and Dean are "put on the bus" after the Apocalypse, but in reality they were "just" relocated to Atlantis.
- Purgatory is briefly opened, but the Leviathans remain contained even as the threat they pose is acknowledged.
- The Reveal: Lya of the Nox reveals to Dean that Ben Braeden is actually his biological son.
- Riddle for the Ages: Everyone at the SGC is left wondering why the demons cloned Caldwell to use the clone as a host for Samuel Campbell's soul rather than try and clone Campbell directly; Sam speculates that Abaddon just needed the illusion of the same body or she didn't have the time to try and find any traces of his original DNA, but Dean simply concludes that, in the end, he doesn't get demons either.
- Sealed Evil in a Duel: The final fate of Abaddon and Menva, compared by the SGC's deceased allies to the final fate of Anubis and Adria when challenged by Oma and Morgan.
- Ship Tease: It is all but explicitly stated that Sam Carter and Jack O'Neill are in a relationship, and it is just slightly more explicit that John Sheppard and Teyla are in the same situation.
- Shipper on Deck: Dishon and Sam each express approval of Lisa's relationship with Dean, which culminates in Lisa becoming Tok'ra herself so that she and her symbiote can marry Dean and Dishon to justify their continued presence in Atlantis.
- Spared by the Adaptation:
- Gabriel survives the confrontation with Lucifer (Granted, he survived that in canon, but this was written before it was known that Gabriel was still alive in the series.).
- Bobby and Rufus are never killed.
- Angels such as Rachel survive as Gabriel returns to Heaven to take an opposing stance to Raphael and thus prevent the angelic civil war.
- Henry Winchester and Josie Mills survive Abaddon's attack on the Men of Letters to form a new division affiliated with the SGC and including Bobby and Rufus as associates if not full members.
- Supernatural Aid: Following the Apocalypse, the SGC and Atlantis gain some aid from angels, albeit with the angels mainly acting as information sources.
- Technical Pacifist: Dean encourages the Nox to take a more active role against demons by arguing that they can use wards and exorcisms, thus preventing them violating their rules against violence as they aren't actually killing anyone.
- Took a Level in Badass:
- Dean and Sam were always tough, but making them Tok'ra gives them access to alien knowledge and two very useful and loyal allies, to say nothing of the respect and assistance of the SGC.
- The SGC also take precautions against the supernatural, starting when Gabriel creates a devil’s trap made of naquadah in the conference room, with the staff establishing more standard traps across all possible entrances a demon might use; Sergeant Harriman even attempts an exorcism when first faced with Abaddon, suggesting that the SGC are at least trying to teach their personnel how to protect themselves against demons even if Harriman couldn't recall the exorcism on his own.
- What the Hell, Hero?: Landry muses that the SGC may receive this from the IOA for revealing the secrets of the program to a couple of wanted killers and a man who thinks he's an archangel (the fact that the killers are supernatural hunters and the man really is an archangel won't be enough to convince the IOA without better evidence).
- Your Magic's No Good Here: Despite the usual idea of science and magic being "incompatible", the alien technology of the SGC fits in rather well with the magic and monsters that the Winchesters face;
- With the "aid" (both known and unknown) of Gabriel, Crowley, and the demon inhabiting Brady, the SGC are able to use the Odyssey's sensors to identify angels, demons (and the differing "ranks" of relevant demons), and even the Horsemen.
- The Ascended are presented as essentially souped-up ghosts, with the result that Dean can wound Chaya Sar by stabbing her hand with an iron knife, and Abaddon and Eva are eventually defeated in the same manner as Anubis and Adria were dealt with.
- For obvious reasons, nobody at the SGC is willing to risk finding out what would happen if a demon-possessed human tried to use a communication stone to contact Destiny.
