Castle Crossovers
Filters
717 | « Prev Page 1 2 3 4 5 12 .. Last Next »

KC Undercover NY Style by amirdias02536
What happens after the season finale of K.C. Undercover, K.C. Cooper joins the NYPD's 12th Precinct as a uniformed police officer? Well, the gang will soon realize that she is a government spy for The Organization. (This is the first Castle and K.C. Undercover Crossover story)
Crossover - Castle & K.C. Undercover - Rated: K+ - English - Romance/Drama - Chapters: 1 - Words: 5,685 - Favs: 2 - Follows: 1 - Published: 8/26/2021 - Rick C., Kate B., K.C. Cooper, Brett - Complete
LCDR Richard Rogers, JAGC, USNR by casketttopgun reviews
My first crossover combining the series Castle with JAG, which went 10 seasons. The Characters from JAG will not play a significant role here, although the theme from the series will. So come join me in this storyline.
Crossover - JAG & Castle - Rated: T - English - Crime/Romance - Chapters: 13 - Words: 28,899 - Reviews: 18 - Favs: 27 - Follows: 27 - Updated: 7/28/2021 - Published: 5/5/2021 - Rick C., Kate B. - Complete
California Dreaming by CheerfulChemist reviews
This is a Castle/The Rookie crossover. The Castle part follows directly from Couples and is in the same AU. Since time hasn't meant much on The Rookie, with 3 seasons covering a year, the timeframes can mesh. Rick, Kate, and Lily go to CA for vacation and some business and meet Officer John Nolan, who looks a lot like Rick. Both want to know why. Cover image by Artifex Prime.
Crossover - Castle & Rookie - Rated: M - English - Family/Mystery - Chapters: 13 - Words: 17,977 - Reviews: 113 - Favs: 60 - Follows: 59 - Updated: 7/3/2021 - Published: 6/21/2021 - Rick C., Kate B., J. Nolan - Complete
Castle vs the Lost Memories by MyNameIsJeffNImLost reviews
Castle was missing for two months with no memory of where he had been. What could Beckett and Castle do to get his life back? See the people in LA they knew had dealt with lost memories. Before Castle 7x02, "Montreal", this can be considered 7th Castle/Chuck crossover in the "Averages" series or 11th in the #CSvTNA series, which also includes Chuck-only stories.
Crossover - Chuck & Castle - Rated: T - English - Mystery/Friendship - Chapters: 5 - Words: 26,507 - Reviews: 15 - Favs: 12 - Follows: 9 - Updated: 6/20/2021 - Published: 6/16/2021 - [Chuck B., Sarah W.] [Rick C., Kate B.] - Complete
Neighborhood Watch by SweetChi reviews
Already worn down by a nightmare of a case, Kevin Ryan is less than thrilled by the unending construction in the apartment above his. Until he meets who's moving in, that is...
Crossover - Buffy: The Vampire Slayer & Castle - Rated: T - English - Mystery - Chapters: 25 - Words: 40,686 - Reviews: 112 - Favs: 99 - Follows: 121 - Updated: 6/18/2021 - Published: 8/29/2015 - Buffy S., Kevin R. - Complete
Beckett vs Lazarus by MyNameIsJeffNImLost reviews
Undercover to catch Lazarus, Beckett was discovered, tortured, and sent to be killed in the woods. She wasn't even supposed to be working drug operations. Near the end of Castle 6x17, "Belly of the Beast", this can be considered 6th Castle/Chuck crossover in the "Averages" series or 10th in the #CSvTNA series, which also includes Chuck-only stories.
Crossover - Chuck & Castle - Rated: T - English - Chapters: 1 - Words: 7,105 - Reviews: 5 - Favs: 13 - Follows: 8 - Published: 6/7/2021 - Chuck B., Sarah W., Carina, Kate B. - Complete
Private Nose by ucsbdad reviews
A sequel to Good Golly, Miss Molly, and to A Merry, Furry Christmas. COMPLETE!
Crossover - Farscape & Castle - Rated: K - English - Mystery/Sci-Fi - Chapters: 1 - Words: 3,011 - Reviews: 9 - Favs: 2 - Follows: 2 - Published: 5/12/2021 - [Kate B., Rick C.] Alexis C., V. Gates - Complete
The Adventures of Castle and Jane by FromDustReturned reviews
Alexis has a not-so-imaginary friend named Charlotte. Richard Castle gets a new idea for his next bestseller. The CBI is not amused, least of all Patrick Jane. A serial killer with a penchant for red heads finds himself once again in the media. And two detectives try to solve the mystery of how a novelist, a mentalist, a girl, and a ghost manage to cause so much trouble.
Crossover - Mentalist & Castle - Rated: K+ - English - Friendship/Hurt/Comfort - Chapters: 2 - Words: 1,804 - Reviews: 3 - Favs: 8 - Follows: 8 - Updated: 5/2/2021 - Published: 4/12/2021 - Patrick J., OC, Rick C., Alexis C.
Una divertida visita a Nueva York by Pxndxcorpse206
Richard Castle se reencuentra con una amiga de Washington, Temperance Brennan, para recordar buenos momentos y pasar más tiempo de calidad como en esos días. Por lo que deberán también pasar buen rato con los demás en Nueva York. Historia entre la temporada 3 de Castle y la sexta de Bones. Puede haber momentos de drama y comedia. No son de mi propiedad.
Crossover - Bones & Castle - Rated: K+ - Spanish - Humor/Drama - Chapters: 3 - Words: 2,001 - Favs: 3 - Follows: 3 - Updated: 4/8/2021 - Published: 12/19/2020
Age of Miracles by Laura Picken reviews
The Guardians, the Avengers, and a 'few' of their friends and allies go to war against HYDRA and end up scouring the far reaches of the galaxy to protect the six Infinity Stones. AU to Avengers 2 and Season 2 of Agents of SHIELD.
Crossover - Castle & Avengers - Rated: T - English - Adventure/Fantasy - Chapters: 52 - Words: 100,875 - Reviews: 126 - Favs: 53 - Follows: 69 - Updated: 3/31/2021 - Published: 4/16/2014 - Rick C., Kate B., Captain America/Steve R., Agent Phil Coulson
Vuelve a mi by LenaLuthorAz reviews
SUPERCORP Lena Luthor ¿¿Alguien es capaz de volver amar a quien ahora odia ?
Crossover - Supergirl & Castle - Rated: M - Spanish - Drama/Romance - Chapters: 35 - Words: 64,463 - Reviews: 1 - Favs: 3 - Follows: 4 - Updated: 2/2/2021 - Published: 1/22/2021 - Kara D./Supergirl, Lena L., Lillian L., Kate B.
Unexpected, Unreal, and Unresisted by AislingIsobel reviews
Castle and Decker cooked up a scheme to get Liya and Lucifer to meet to fix to problems, one to keep Liya from falling down her all too familiar pit of loneliness and despair, and two to keep Lucifer preoccupied with Liya to let Chloe work. It was perfect, Rick had an excuse to take Liya to L.A. as Cold Heat had been optioned for a movie, however would she meet the handsome Devil?
Crossover - Castle & Lucifer - Rated: M - English - Romance/Supernatural - Chapters: 17 - Words: 29,185 - Reviews: 15 - Favs: 14 - Follows: 14 - Updated: 1/2/2021 - Published: 3/20/2019 - Rick C., OC, Lucifer M., Chloe D. - Complete
Jason Beckett by 1999Blue reviews
Jason Beckett had a pretty good life. That was until he decided to try and put a cow in the men's locker room. Now he is stuck in Saturday detention and helping his mom at the precinct. He meets a group of kids and becomes a Power Ranger. Let's hope he can keep this a secret from his mom and the rest of her team. (First story. Constructive criticisms is welcome.)
Crossover - Power Rangers & Castle - Rated: T - English - Family/Adventure - Chapters: 2 - Words: 611 - Reviews: 3 - Favs: 6 - Follows: 6 - Updated: 10/25/2020 - Published: 11/26/2017
To Love and Die in Manhattan by ucsbdad reviews
Everybody liked Mike Royce, so I wrote this somewhat AU take on...You can guess what episode it's based on.
Crossover - 24 & Castle - Rated: K - English - Mystery/Adventure - Chapters: 8 - Words: 14,627 - Reviews: 56 - Favs: 11 - Follows: 17 - Updated: 10/15/2020 - Published: 10/8/2020 - [Kate B., Rick C.] V. Gates, M. Royce - Complete
futures found in bookstores by kitsunerei88 reviews
Castles have always found themselves in bookstores, and Alexis is no different. Or: Alexis Castle finds a book, or maybe the book finds her. Written for Gray Cardinal for Crossworks 2020.
Crossover - Young Wizards & Castle - Rated: K - English - Chapters: 1 - Words: 1,458 - Reviews: 1 - Favs: 3 - Follows: 1 - Published: 9/9/2020 - Alexis C. - Complete
The Castle-Nolan Conspiracy by DoctorCaskett reviews
Gates has had a strange first day at the LAPD. One of her Rookie officers looks exactly like a certain irritating murder mystery writer, and she suspects a prank is afoot. Crossover between Post-series Castle and Season 1 of The Rookie.
Crossover - Castle & Rookie - Rated: K - English - Humor - Chapters: 1 - Words: 1,333 - Reviews: 5 - Favs: 31 - Follows: 21 - Published: 9/7/2020 - Rick C., Kate B., V. Gates, J. Nolan - Complete
Family Secrets by prettyhuntress reviews
One-Shot; Kate is invited to eat dinner with Castle and his family, only to discover that that family is not what it seems.
Crossover - Charmed & Castle - Rated: T - English - Family - Chapters: 1 - Words: 1,244 - Reviews: 1 - Favs: 8 - Follows: 7 - Published: 8/9/2020 - Prue H., Piper H., Rick C., Kate B.
Magic and Murder in NYC by Araurlis reviews
Beckett gets some extra-terrestrial assistance in a murder. I own neither Castle nor World of Warcraft. This is likely to become a multi-cross incorporating SG-1 and Harry Potter both of which I still don't own.
Crossover - Warcraft & Castle - Rated: M - English - Fantasy - Chapters: 1 - Words: 4,863 - Reviews: 3 - Favs: 6 - Follows: 10 - Published: 8/3/2020 - Night Elf, Rick C., Kate B.
Light Wave by RhiStar reviews
Basically the show Castle with Lux. It takes place around the sixth season. It is told with the stories you know from the shows twisted in the new reality. Hope you enjoy it and don't forget to write a review to help me find a path.
Crossover - Castle & Life Unexpected - Rated: K+ - English - Drama/Family - Chapters: 25 - Words: 98,599 - Reviews: 42 - Favs: 18 - Follows: 27 - Updated: 5/12/2020 - Published: 10/8/2014 - Rick C., Kate B., Lux C. - Complete
Twins by ucsbdad reviews
Vampire Simone Renoir helps Detective Kate Beckett, in more ways than one. COMPLETE!
Crossover - Librarian & Castle - Rated: K - English - Supernatural/Mystery - Chapters: 6 - Words: 10,683 - Reviews: 51 - Favs: 18 - Follows: 23 - Updated: 3/30/2020 - Published: 3/25/2020 - Simone R., Rick C., Kate B., Roy M. - Complete
Close Encounters of the Ancient Kind by penna.nomen reviews
John Sheppard and Rodney McKay go to New York when Ancient technology is involved in the death of an astrophysicist. They inspire Richard Castle to write science fiction.
Crossover - Stargate: Atlantis & Castle - Rated: T - English - Humor/Sci-Fi - Chapters: 1 - Words: 1,656 - Reviews: 1 - Favs: 6 - Follows: 4 - Published: 2/21/2020 - Rodney M., John S., Rick C., Javier E. - Complete
Yo a Boston y tú a Nueva York by AniMaga reviews
¿Qué pasaría si Kate Beckkett y Emily Byrne fueran hermansas separadas al nacer y se conocen durante una convivencia de policías?
Crossover - Castle & Americans - Rated: K - Spanish - Family - Chapters: 1 - Words: 6,103 - Reviews: 1 - Favs: 2 - Follows: 1 - Published: 2/3/2020
Good Golly Miss Molly by ucsbdad reviews
A short Caskett crossover from the universe of the Henson Company's Farscape.
Crossover - Farscape & Castle - Rated: K - English - Sci-Fi/Mystery - Chapters: 2 - Words: 5,144 - Reviews: 15 - Favs: 9 - Follows: 12 - Updated: 1/9/2020 - Published: 1/8/2020 - Aeryn S., J. Crichton, Rick C., Kate B. - Complete
A Tail of Murder by jedi-from-mordor reviews
Post series finale minus epilogue. Captain Kate Beckett is back at work, just in time for a very odd corpse to show up. The investigation leads to an ancient secret...
Crossover - Castle & Mako Mermaids - Rated: T - English - Mystery/Humor - Chapters: 5 - Words: 7,245 - Reviews: 1 - Favs: 7 - Follows: 4 - Updated: 9/27/2019 - Published: 9/18/2019 - Rick C., Kate B., Rita S. - Complete
The Princess and the Detective by AislingIsobel reviews
Could a mortal and a goddess survive all the obstacles in their way, from friends to the media, was it worth it for Javier or would Amaliya get her heart broken even more than before.
Crossover - Marvel & Castle - Rated: M - English - Romance/Drama - Chapters: 3 - Words: 2,391 - Reviews: 2 - Favs: 2 - Follows: 1 - Updated: 8/5/2019 - Published: 7/25/2019 - C. Barton/Hawkeye, OC, Javier E.
717 | « Prev Page 1 2 3 4 5 12 .. Last Next »