Scryer

Browncoat, Green Eyes by nonjon

COMPLETE. Firefly: :Harry Potter crossover Post Serenity. Two years have passed since the secret of the planet Miranda got broadcast across the whole 'verse in 2518. The crew of Serenity finally hires a new pilot, but he's a bit peculiar.

Firefly - 2006-11-13 Complete - M - Adventure - Harry P., River - 298,538 words - 39 chapters - 4,801 reviews - 10,239 favorites - 3,523 follows

Chronicles of the Galactic Coalition by ThePhantomMedjay

In 2600, Terran Society is unified together by diverse species with highly advance technologies from magic, science, and magi-tech, the Terran Trinity. It is their influence and strength to combat the galactic threat that truly changes the known world for the better. All amid internal strifes, ambitious megastructures, and Terran-kinds resilient nature to face the ultimate test.

Mass Effect - 2024-06-19 In-Progress - T - Sci-Fi/Adventure - Harry P., U. Wrex, U. Grunt, Aethyta - 70,501 words - 1 chapter - 17 reviews - 136 favorites - 166 follows

Harry Potter and the Jedi Chronicles by Roff Stale Result (Last seen: 2026-04-01)

Young Harry manages to leave all his abuse behind and travels to a far away place where he discovers a great power within himself. He makes a few friends along the way.

Star Wars - 2020-08-18 Complete - T - Adventure/Sci-Fi - Harry P., Revan - 112,928 words - 26 chapters - 452 reviews - 2,023 favorites - 2,023 follows

The Force Shall Free Me by AnimaDefensor Stale Result (Last seen: 2026-05-11)

The Force shudders as a new force in the Dark Side emerges on the desert planet of Jakku. What follows irreparably changes the fate of the galaxy, as now the one touched by Death walks among a galaxy rebuilding twenty years after the Battle of Endor.

Star Wars - 2021-12-03 In-Progress - T - - Harry P., Rey, Luke S., Kylo Ren/Ben Solo - 54,915 words - 9 chapters - 136 reviews - 775 favorites - 1,062 follows

A Jedi in Dumbledore's Court - Episode II by Mnementh1 Stale Result (Last seen: 2026-05-11)

Harry Potter, Jedi Padawan, returns for his second year at Hogwarts School of Witchcraft and Wizardry. With Voldemort still trying to come back to life, Harry and his friends must face additional foes at Hogwarts during her most desperate hour. The opening of the Chamber of Secrets! Sequel to A Jedi in Dumbledore's Court - Episode I Beginning edit for grammar and spelling Nov 16

Star Wars - 2020-11-05 Complete - T - Adventure/Sci-Fi - Harry P., Hermione G. - 114,306 words - 28 chapters - 718 reviews - 1,608 favorites - 1,892 follows

Harry Potter and the Power of the Dark Side by Faykan Stale Result (Last seen: 2026-05-11)

Only the strong may rule, this was the way of the Dark Side, and Darth Millennial was about to prove to his master that he was worthy of the title Dark Lord of the Sith, but first a tremor in the Force draws him to the Unknown Regions of space... I do not own the picture

Star Wars - 2020-11-12 Complete - T - Adventure/Sci-Fi - Harry P., Draco M., Luna L. - 329,861 words - 54 chapters - 1,023 reviews - 2,623 favorites - 2,154 follows

I'll Choose My Own Path by raspberry dreams

Vernon and Petunia refuse to keep Harry, abandoning him with distant relatives. John embraces the idea of becoming a father to his abandoned cousin and takes him away to keep him safe. Is magic and Hogwarts going to be enough of an attraction to a boy who grew up on a seemingly almost sentient flying city in another galaxy.

Stargate: Atlantis - 2023-07-01 Complete - T - Family - John S., Rodney M., Harry P., Albus D. - 187,897 words - 36 chapters - 509 reviews - 1,098 favorites - 918 follows

Harry Potter: Humanity's Last Hope by Emperor Vanquest

Harry, after discovering Atlantis, accidentally activates Janus' Dimensional Transport & Time Dilation device while en route from Lantea to Earth and triggered both a dimensional shift and a time jump, which rendered him unconscious. He awakens in a star system not too distant from Earth, and finds Atlantis has carried out his last order.

Stargate: SG-1 - 2018-11-05 Complete - T - Drama/Sci-Fi - S. Carter, Gen. Hammond, J. O'Neill, Harry P. - 64,511 words - 5 chapters - 224 reviews - 1,052 favorites - 1,027 follows

Quarian's Wizard by Quatermass

They had thought each other to be imaginary friends. One, a human wizard from the 20th Century. The other, a Quarian from the 22nd. And yet, as her Pilgrimage takes a turn for the worse, Tali'Zorah is surprised to find Harry Potter turn up. But can their bond flourish as they, along with Commander Jeanne Shepard, try to put an end to the insane plans of Saren?

Mass Effect - 2021-11-24 Complete - M - Sci-Fi/Fantasy - Harry P., Tali'Zorah, Shepard - 77,684 words - 24 chapters - 333 reviews - 1,349 favorites - 1,360 follows

Avalon, Secret of the Stars by donniedarko81

A hidden history revealed and the dawning of a new era or the end of another. There is some bashing in this story. You don't like it don't bother reading.

Stargate: SG-1 - 2019-01-24 In-Progress - T - Sci-Fi/Adventure - Harry P., Hermione G. - 231,494 words - 43 chapters - 1,203 reviews - 2,386 favorites - 2,808 follows

Using The Force in Star Trek? by fvdv123

It had to happen, Old Guy stumbles into Scy-Fy, No, not Star Wars, Star Trek is more like it. He wakes up in the body of a man named Harry Potter, so, Harry will tear through the Trekky verse, and shag as many females as he can. You know me, Self-Insert, Harem, Cringe, and Gary Stu are my trademarks. Run away if I ever try Drama, that would scare even me. DS9, with some side-jumps.

harem

StarTrek: Deep Space Nine - 2023-06-16 Complete - M - Humor/Parody - Jadzia D., M. O'Brien, Quark, Harry P. - 71,329 words - 16 chapters - 242 reviews - 709 favorites - 666 follows

An Unexpected Development by LillyBaaaka

Harriet Potter had given up hope on maintaining a so-called 'normal' life. So when the expected unexpected happens, why's she so annoyed? A story told in pieces. FemHarry

gender bender

Star Trek: 2009 - 2022-01-26 Complete - T - Friendship - Harry P., Spock, L. McCoy/Bones - 116,756 words - 43 chapters - 637 reviews - 1,507 favorites - 1,671 follows

Space Wizards: Dawn of the DSF by yoden

A sequel to Esama's "Wizards IN SPACE" on Ao3. Book 1: As the crew of an alien spaceship, Harry and the DA must make their own place in a world torn by war. Between discovering the secrets of alien tech, creating their own, fighting for survival and building up an international organization, they are up for an interesting year.

Stargate: SG-1 - 2024-07-07 Complete - T - Adventure/Drama - Harry P., Albus D. - 102,935 words - 19 chapters - 150 reviews - 435 favorites - 550 follows

Serpentine by Rage Addiction

In a world with where Harry wasn't sent to his other family due to the jealously might've shown towards his younger brother. He taught himself, trained himself and molded himself into something no one ever expected him to be. (Harry Potter x Stargate x The Dresden Files) Harry x small three person Harem.

harem

Stargate: SG-1 - 2016-01-15 In-Progress - M - Adventure/Romance - Harry P., Pansy P., OC, Adria - 64,381 words - 7 chapters - 268 reviews - 1,538 favorites - 1,695 follows

Harry Potter: Rise of an Empire by Lord-Drakos

DISCONTINUED. Discovering his magic at an early age, Harry Potter set's out on a journey of adventure. An encounter with a Goa'uld however, sets him on the path of conquest and godhood. Powerful-Godlike Harry. Goa'uld Harry. Gray Harry. Rated M for violence and language. Warning: Contains Cliches.

Stargate: SG-1 - 2014-07-20 In-Progress - M - Adventure/Sci-Fi - Harry P. - 106,929 words - 11 chapters - 558 reviews - 2,118 favorites - 2,260 follows

In this Universe or the Next by AlwaysVictory

Three years after the War, Harry and Hermione are thrown through the Veil during a Death Eater attack at the Department of Mysteries. Instead of dying, they end up in a world where Muggles travel among the stars. Follow Harry and Hermione in their adventures in the Star Trek universe, saving as many lives as they can – starting with the defeat of Nero. Part 1. Complete.

Star Trek: 2009 - 2019-09-25 Complete - T - Adventure/Sci-Fi - Harry P., Hermione G., J. Kirk, C. Pike - 177,683 words - 28 chapters - 872 reviews - 1,726 favorites - 1,756 follows

First Contact by inwardtransience Stale Result (Last seen: 2026-05-11)

Beth already had a bad feeling that her fifth year at Hogwarts was going to turn out to be pretty miserable — as pessimistic as she was, she hadn't seen a literal alien invasion coming. Because apparently the infamous Potter luck was screwing over the whole planet now. (eventual F/F) [Dimitran Fleet, part 1/4]

Star Wars - 2025-02-05 Complete - M - - Harry P., Hermione G., Sirius B. - 356,910 words - 35 chapters - 149 reviews - 412 favorites - 479 follows

DLP 3.69

Fighting the Gods by phoenix catcher

Ryver/Michael Mentions of . Alteran:Harry. Clone:Harry Ryver . Harry must face the Galaxy and try to rebuild the strength of the Great Races while caring for his twin brother who has their destiny on Earth on his shoulders.

Stargate: SG-1 - 2013-07-22 In-Progress - M - Sci-Fi/Adventure - Harry P. - 364,566 words - 38 chapters - 2,744 reviews - 3,313 favorites - 3,424 follows

Cast between Worlds by phoenix catcher

Harry/Sheppard. Non-magical:Harry but with Metahuman abilities. Harry is exiled from the Wizarding World and joins the RAF. This is what would happen if Harry joined the Atlantis Expedition. Follows from season 1 all the way to the end.

Stargate: Atlantis - 2014-06-19 In-Progress - M - Sci-Fi/Adventure - Harry P., John S. - 241,901 words - 17 chapters - 1,046 reviews - 2,265 favorites - 2,581 follows

Q Raises Harry Potter by bco

Q raises Harry Potter in order to create a third timeline where the Harry Potter world eventually becomes the Star Trek world.

StarTrek: The Next Generation - 2026-03-24 In-Progress - T - - Q, Vash, Harry P. - 107,076 words - 44 chapters - 40 reviews - 97 favorites - 128 follows

Last Ancient by runick4

ABANDONED On that Halloween night, Harry saves his twin, damaging his magic; Left on Privet drive, he grows up on his own; When he is eight, he starts doing freaky things that he can't understand; Discovering Merlin's hologram at Glastonbury Tor gives him a real family, and changes the fate of the Galaxy; Squib!Harry, Telekinetic!Harry, Pic is basic model of Hermes class ship

Stargate: Atlantis - 2015-07-29 In-Progress - T - Adventure/Drama - Harry P. - 223,392 words - 26 chapters - 1,136 reviews - 2,410 favorites - 2,639 follows

Black Hole by daistaf Stale Result (Last seen: 2026-05-11)

When Harry saw his godfather fall toward the Veil of Death in the department of Mysteries, he tried to push all his magic to reach Sirius in time before his demise, but life's never fair with Harry Potter, or is it? Harry in Star Wars universe. Force user Harry. Harry/Padmé. (AN/9 July 2016 : : I'm still alive guys but very busy, updates are coming, I promise)

Star Wars - 2013-03-22 In-Progress - T - Adventure - Padmé Amidala, Aayla S., Harry P. - 52,122 words - 9 chapters - 459 reviews - 1,676 favorites - 1,978 follows

Harry Tano by TheBeardedOne Stale Result (Last seen: 2026-05-11)

After resigning from the Jedi Order, Ahsoka didn't expect to find herself sent to a new world, especially a world where a young boy needed her help... (Epilogue 1 links to Knave Squadron.)

Star Wars - 2013-10-20 Complete - T - - Ahsoka T., Harry P. - 136,800 words - 57 chapters - 2,362 reviews - 4,647 favorites - 2,872 follows

Harry Potter and the Lost Ancients by warugaki

AU After the final battle the Hallows give Harry dreams on how to fully unite them and it turns out that they are a hidden and updated repository of knowledge for the Lantean people. How will he lead the wizarding world to the stars? under rewrite...

Stargate: Atlantis - 2018-02-19 In-Progress - M - Sci-Fi - Harry P., Parvati P., Padma P. - 107,290 words - 18 chapters - 411 reviews - 1,429 favorites - 1,766 follows

Jedi Knight by Thatdude2106 Stale Result (Last seen: 2026-05-11)

Everyone is turning against him...again. Growing tired of dealing with the people around him, Harry seeks to find solitude. In his search to find a place to rest his head, he stumbles upon one of the greatest secrets in the world. What will he do with such knowledge? How will this change the future?

Star Wars - 2014-05-19 In-Progress - T - Adventure/Sci-Fi - Harry P. - 86,837 words - 12 chapters - 436 reviews - 1,807 favorites - 1,953 follows

Search: HP/Sci-Fi Mix, >50k