1 - 20 of 57 Works in Alien Castiel (Supernatural)

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  1. Tags
    Summary

    Space pilot Dean is caught trying to break Sam out of prison, and ends up tossed into a cell with a half-man, half tentacly monster alien.

    Language:
    English
    Words:
    19,331
    Chapters:
    9/?
    Collections:
    1
    Comments:
    187
    Kudos:
    266
    Bookmarks:
    42
    Hits:
    3060
  2. Tags
    Summary

    After a comet unexpectedly changes course and destroys the colonized planet they were raised on, Dean and Sam Winchester find refuge on their mother’s old spaceship, The Impala, now piloted by their friend Ellen and her motley crew.

    Joined by their mentor Bobby and a strange stowaway named Castiel, they find themselves pursued by powerful forces that want humanity destroyed.

    Language:
    English
    Words:
    18,829
    Chapters:
    10/?
    Comments:
    26
    Kudos:
    50
    Bookmarks:
    14
    Hits:
    1508
  3. Tags
    Summary

    Dean's never been embarrassed about his porn collection before, but that was before he found Cas holding his prized copy of Sweet Princess Asuka and the Tentacles of Pleasure. Dean finds himself sweating bullets—because this is Cas, sweet, nerdy Cas. Cas, his friend. Cas, his roommate. Cas, his—only slightly out-of-control—crush.

    Cas, with his big, blue eyes and muscular arms and perpetual sex hair. 

    Cas, with his tentacles. 

    The last thing he expects is for Cas to suggest they experiment together.

    Language:
    English
    Words:
    7,658
    Chapters:
    1/1
    Collections:
    1
    Comments:
    73
    Kudos:
    413
    Bookmarks:
    80
    Hits:
    2875
  4. Tags
    Summary

    Castiel, a time travelling space alien, one of the few remaining of his species, is on an urgent scientific recon mission to research the mating habits of earthlings and analyse the potential breeding opportunities for his kind. Georgian era England seemed a promising time period to try, what with all the unwedded young people desperately looking for their mates in Bath, bars and balls. Castiel is quickly enchanted with Dean, the eldest of three wayward sons and secretly a salacious Gothic novel writer to boot. Though the chances of a successful mating between him and Dean seemed low, especially given how much Dean liked to laugh at his amorous attempts, Castiel is determined to try his best with scientific rigour and intellectual passion.

    Language:
    English
    Words:
    24,473
    Chapters:
    9/?
    Comments:
    107
    Kudos:
    94
    Bookmarks:
    22
    Hits:
    1752
  5. Tags
    Summary

    Dean thought that he would never see Castiel again. So, when his alien love turned up on his doorstep after his return from Mars, he was ecstatic.

    Castiel has a lot of questions to answer, but they have other problems to deal with, too. It turns out that hiding an alien in your apartment—especially when you work for NASA—is a very dangerous idea.

    A sequel to Personal Space.

    Series
    Language:
    English
    Words:
    70,903
    Chapters:
    13/13
    Collections:
    2
    Comments:
    894
    Kudos:
    807
    Bookmarks:
    125
    Hits:
    7410
  6. Tags
    Summary

    Dean, a low-level (human) diplomat stationed in deep space, is part of a team trying to negotiate peace between two peoples who have been arguing for decades. Cas is an alien brought in to negotiate for the other side.

    When their lives collide, neither will ever be the same.

    Language:
    English
    Words:
    11,960
    Chapters:
    8/?
    Comments:
    42
    Kudos:
    96
    Bookmarks:
    11
    Hits:
    1738
  7. Tags
    Summary

    There is no longer a blue sky. The only thing that greets the eye when the head is tilted back is the ugly belly of the beast that came to Earth a thousand years ago; the enormous structure that, without a doubt, has taken a toll on the planet and all the creatures inhabiting it. So large it blocks the sun after midday, the Mothership is said to have come without warning, encroaching on the human race and perpetuating an end date unforeseeable by even the best of minds. Red like oxidized iron, dusty like the desert sands, the structure looks like a floating fortress in the Earth’s atmosphere, a quiet suggestion of what may come should the humans stray from their tasks.

    Dean Winchester dreams of building his own spaceship and blasting off into the cosmos with his little brother to start their lives anew.

    Series
    Language:
    English
    Words:
    10,812
    Chapters:
    1/1
    Collections:
    1
    Comments:
    67
    Kudos:
    272
    Bookmarks:
    24
    Hits:
    2009
  8. Tags
    Summary

    Dean is an astronaut, and he definitely chose the career so that he could help move humanity forward, not just because he didn't want to sit in an office, thank-you-very-much.

    Becoming the first human to set foot on Mars was never part of his five-year plan, but he loved his job and couldn't say no when the opportunity arose.

    He had spent plenty of time thinking about what he was risking never seeing again if something went wrong; his brother, brother-in-law, and the adorable kid they were adopting, not to mention his friends, his car, and pie.

    What he hadn't considered was what, or who, he might find when he actually got there.

    Series
    Language:
    English
    Words:
    40,795
    Chapters:
    13/13
    Collections:
    4
    Comments:
    657
    Kudos:
    1012
    Bookmarks:
    206
    Hits:
    8693
  9. Tags
    Summary

    When the Celestials came to Earth, they didn't anticipate a rebellion to sprout up. In an effort to win over the unknown rebels, the Arch Angels send Seraphs down to the surface to cultivate relationships with individual humans. Seraph Castiel is assigned one Dean Winchester, lowly Kansas mechanic.

    Series
    Language:
    English
    Words:
    30,228
    Chapters:
    4/4
    Comments:
    29
    Kudos:
    53
    Bookmarks:
    17
    Hits:
    1573
  10. Tags
    Summary

    When Dean finds a stranger in his yard, it gets easier to forget how alone he's felt for the past few months, ever since his brother left for college and his girlfriend dumped him. Castiel is otherworldly, and doesn't really understand human culture, but over time he begins to mend Dean's broken heart and chase away the loneliness that threatens to swallow him whole.

    Language:
    English
    Words:
    1,390
    Chapters:
    1/?
    Comments:
    2
    Kudos:
    16
    Hits:
    384
  11. Tags
    Summary

    Dean and Sam are going through challenges as being rare human/gem hybrids such as harsh prejudice from humans due to the infamous Gem Invasion while the superhuman John is still somewhat traumatized about what has happened to him in Gem Homeworld breeding facility for Project Organic Gem & facing his loss of his beloved Emerald Gem who saved him, Bobby & Dean from Homeworld.

    Despite winning the war, the rebel gems literally have to pick up the pieces & captured the corrupted gems. Lucifer the leader of the rebel gems have a strong feeling that Homeworld is not done with Earth yet.

    The rebel gems are trying to recruit the Winchester brothers & other gem hybrids to join them due to the high chance of another Gem Invasion much to John's displease not wanting the boys to be involve with them.

    When a Homeworld Celestine comes to the planet, it alarms the Winchesters. The Celestine claims to be sent here as to research on the gem Hybrids and the superhumans & said that Homeworld isn't planning to invade again but the Winchesters don't trust him. Despite this, they are hiding him from Lucifer's Gems for their own motives

    Series
    Language:
    English
    Words:
    8,111
    Chapters:
    7/?
    Comments:
    6
    Kudos:
    23
    Bookmarks:
    7
    Hits:
    790
  12. Tags
    Summary

    Dean Winchester left Earth with his parents twenty-five years ago aboard the colony ship St. Louis. Three years into the five-year journey, a freak energy wave decimated the ship’s inhabitants, cut off their communication with Earth, and destroyed their navigation system. Now, Dean and his best friend Jimmy are one of the teams who fly out to survey potential planets for habitability.

    Dean’s pretty sure they’re not going to find one in his lifetime.

    When something goes wrong on what should be a routine survey mission, Dean has to face Jimmy’s death, the existence of extraterrestrial life, and the truth about what killed his parents—all while trapped in a broken shuttle with an alien life form that’s taken over his friend’s corpse.

    Language:
    English
    Words:
    6,140
    Chapters:
    1/1
    Collections:
    1
    Comments:
    40
    Kudos:
    155
    Bookmarks:
    11
    Hits:
    1318
  13. Tags
    Summary

    Welcome to the historical drama/space opera you've always wanted, in which Castiel, Gabriel, Lucifer, and Michael are princes and soldiers of the Empire of Aljana, a sprawling behemoth of an empire that mines primitive and uninhabited worlds dry for resources to fuel their greedy and ever-expanding populace. They stumble upon Earth in the early 1940's, but a loophole in the system deems the planet a threat. World War Two is raging in Europe and Asia, but soon the world will have much bigger problems. Who will stand for Earth? Can Dean and Castiel fight back against the largest, most brutal empire the galaxy has ever seen, and will they find love only to lose everything in the ultimate battle for freedom and for peace?

    Language:
    English
    Words:
    1,246
    Chapters:
    1/8
    Kudos:
    6
    Hits:
    106
  14. Tags
    Summary

    Dean has accepted a job hauling one of the deep-space creatures known as 'Angels'. They're dangerous, strong, and unpredictable, but the Credits are the right incentive for temptation. A Winchester doesn't turn down a lucrative job. The only problem is, Winchesters never had much sense.

    Series
    Language:
    English
    Words:
    4,836
    Chapters:
    1/1
    Comments:
    26
    Kudos:
    248
    Bookmarks:
    39
    Hits:
    5808
  15. Tags
    Summary

    In a world where humans are considered cute and popular pets, Dean is an abused rescue "animal" and Castiel is the high-strung alien businessman who wants something to care for.

    When the two cross paths at the animal shelter, Castiel decides Dean is just the creature to shower with his love and affection -- whether Dean likes it or not.

    Language:
    English
    Words:
    24,065
    Chapters:
    21/21
    Comments:
    174
    Kudos:
    1591
    Bookmarks:
    299
    Hits:
    34415
  16. Tags
    Summary

    Commander Dean Winchester doesn’t hate aliens. But there’s this one race in particular that he just cannot stand. When Starfleet signs an agreement to allow members of this particular alien race to serve aboard it’s starships, the Chief Engineering Officer has no choice but to, as his brother says, “stow his crap”. Okay, so he can maybe learn to tolerate the engineer they assigned him - Crewman Gabriel is kinda odd and isn’t like all the others of his kind. But the others... Maybe Commander Castiel, the new First Officer, isn’t so bad... Actually, maybe he’s kinda okay... But the rest are still dicks... mostly. Shut up.

    Series
    Language:
    English
    Words:
    7,835
    Chapters:
    9/9
    Comments:
    13
    Kudos:
    125
    Bookmarks:
    23
    Hits:
    1447
  17. Tags
    Summary

    Xenophilia- is sexual attraction toward the unknown, or that which is different. Typically feel sexual desires for one or more fictional races of aliens, mutants, or other sentient beings that are not human in movies, books, etc.

    Or the one where Castiel is an alien and Dean works out his feelings for Cas.

    Series
    Language:
    English
    Words:
    921
    Chapters:
    1/1
    Comments:
    5
    Kudos:
    51
    Bookmarks:
    1
    Hits:
    621
  18. Tags
    Summary

    A few months after the death of his husband Jimmy, Dean Winchester is disturbed from his dreams by an unearthly glow coming from his living room. Based off of aspects of the movie Starman.

    Language:
    English
    Words:
    818
    Chapters:
    1/?
    Comments:
    5
    Kudos:
    11
    Bookmarks:
    5
    Hits:
    243
  19. Tags
    Summary

    The ship is going down. There's no avoiding it. Castiel does everything he can to prepare, and then straps in and hopes for the best.

    When the ship is down, it's found almost immediately. Castiel had the good fortune to be found by two people who were willing to help him instead of turning him over to the government to deal with. From what he'd seen in orbit, the government would probably make the rest of his life miserable. The Winchesters, on the other hand, are perfectly willing to make his life as comfortable as it can be on the alien world.

    Language:
    English
    Words:
    8,797
    Chapters:
    5/5
    Collections:
    1
    Comments:
    21
    Kudos:
    42
    Bookmarks:
    9
    Hits:
    758
  20. Tags
    Summary

    In the beginning of time itself, there were many Celestials, stardust beings that populated the galaxies. Then, the Fallen came into existence, devouring them.

    Castiel, one of the last of the Celestials, descended onto Earth by orders of his garrison leader. What he finds there is the soul he lost long ago, the other part of him that he'd been searching for.

    Dean was a normal guy, living his life and trying to take care of his errant researcher brother. When his brother asks him for a favor, claiming that an alien wants to speak to him, he's of course skeptical.

    He didn't expect that meeting to change the course of his entire life, throwing him into a war that he wasn't prepared for.

    Language:
    English
    Words:
    36,900
    Chapters:
    3/3
    Collections:
    2
    Comments:
    54
    Kudos:
    212
    Bookmarks:
    61
    Hits:
    4305

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