8 Companion In Blue Searching for an empty world on which to stretch his mind and collect his thoughts, the Doctor finds the lost colony of Pern and is changed forever by a new friend. Rating T for now due to draconic sexuality. May go up later, but I'm not sure.
Doctor Who & Dragonriders of Pern series, T, English, Adventure & Drama, words: 3k+, favs: 10, follows: 20, 1/6, 10th Doctor, OC
27 Enter the Doctor » YAHF: Xander picks up something that isn't a gun in Ethan's shop. Repost from a profile I lost the password to. (Yes, another one.)
Buffy: The Vampire Slayer & Doctor Who, T, English, Adventure & Supernatural, chapters: 8, words: 56k+, favs: 194, follows: 275, updated: 12/29/2019 published: 11/3/2017, Xander H., 10th Doctor
178 Jimmy Evans » Harry runs away to America and eventually joins the Air Force under an assumed name. He ends up on SG-20, and is captured by Herur. His host is damaged, so he tries to take Harry as a replacement. Big mistake. Chapter 3 is up.
Stargate: SG-1 & Harry Potter, T, English, Adventure & Drama, chapters: 4, words: 15k+, favs: 976, follows: 1k+, updated: 12/15/2019 published: 1/24/2019, S. Carter, D. Jackson, J. O'Neill, Harry P.
61 Potterhouse » A thieving Dumbledore, a new teacher, and his own familial inheritance will make for an exciting and dangerous fifth year for Harry James Potter. There're a blue Police box and a red Phone box in the corridor outside Myrtle's bathroom.
Doctor Who & Harry Potter, K+, English, Adventure & Drama, chapters: 7, words: 42k+, favs: 362, follows: 509, updated: 12/15/2019 published: 10/18/2017, 11th Doctor, Harry P.
146 Harry Potter and the Way of the Jedi » Not a true crossover, but a case of someone using magic to make fiction a reality. And who would that someone be? Who else, but Harry? Alternate Year 5, and beyond. Chapter 7 now available! Chapter 3 fixed!
Star Wars & Harry Potter, K+, English, Adventure & Drama, chapters: 7, words: 46k+, favs: 634, follows: 918, updated: 4/7/2019 published: 10/21/2017, [Luna L., Harry P.] [Ron W., Hermione G.]
29 Hendgelin » Harry Potter is dead. This is his new life in Middle Earth. HP/OC, not a big part of the story. Brotherhood fic.
Harry Potter & Lord of the Rings, K+, English, Adventure & Family, chapters: 4, words: 24k+, favs: 153, follows: 255, updated: 1/24/2019 published: 7/12/2018, Harry P., Frodo B.
7 The Quick and the Doctor Not really a crossover. One of Clara's echoes in an encounter with the 9th Doctor, just after he's regenerated from the Warrior. Follows the storyline of the movie, mostly. One-shot. Rated M for gun violence.
Doctor Who & Quick and the Dead, M, English, Drama & Western, words: 15k+, favs: 2, 11/4/2018, 9th Doctor, 11th Doctor, Clara O.
30Alone » Abandoned by the Dursleys, Harry raises himself. Then things really get interesting! Rated T because I'm paranoid.
Harry Potter, T, English, chapters: 3, words: 9k+, favs: 99, follows: 153, updated: 9/21/2018 published: 8/24/2018, Harry P., Albus D., Luna L.
65 More Than Meets The Eye » Convicted of murdering Cedric Diggory, Harry chooses to walk through the Veil of Justice. Hermione, Remus and Sirius go with him, and because all are innocent, none are killed (save the Horcrux). It sends them away from their persecutors and into a new world, which unbeknownst to them is about to be at war, as well. Harry/Hermione, Sam/Mikaela. Enjoy!
Harry Potter & Transformers, T, English, Sci-Fi & Adventure, chapters: 3, words: 10k+, favs: 449, follows: 565, updated: 5/9/2018 published: 10/17/2017, Harry P., Hermione G., Sam W., Bumblebee
20 Becoming Human, Book One: Ape Child » A very different family will have the raising of The-Boy-Who-Lived. And that changes everything!
Harry Potter & Tarzan series, K, English, Adventure, chapters: 3, words: 11k+, favs: 108, follows: 129, updated: 11/3/2017 published: 10/19/2017, Harry P.