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Manehattan Takes Rarity by EqualisE
A white unicorn lay upon the heaps of waste, clothed in a gorgeous red dress. Although her indigo mane and attire were disfigured, she still seemed royal, almost like an Alicorn princess—if not for the two gaping holes in her chest and the darkened blood smeared on her legs and hooves. It's up to Beckett and Castle to solve the case. (Set in Season 3 of both shows.)
Crossover - My Little Pony & Castle - Rated: T - English - Crime/Adventure - Chapters: 3 - Words: 7,095 - Follows: 1 - Updated: 3/25 - Published: 3/24 - Rarity, Princess Luna/Nightmare Moon, Rick C., Kate B.
Arc of the Curve by Mountain King reviews
Some people are extraordinary. This can be both a blessing and a curse. For Alexis Castle it's been a secret she's kept all her life, now she's had to reveal that secret and it means that both her and her family learn just how extraordinary people can be.
Crossover - Tomorrow People & Castle - Rated: T - English - Sci-Fi/Supernatural - Chapters: 12 - Words: 38,005 - Reviews: 16 - Favs: 9 - Follows: 17 - Updated: 3/24 - Published: 2/14/2014
Blood Moon by Laura Picken reviews
A Forever crossover in my original "Guardians of Shangri La" Castle Universe. When Henry and Jo are facing one of the toughest cases of their lives, they get help from some unexpected places. PRIMARILY A FOREVER STORY. Castle characters (especially the Guardians) will be mostly support, at least at the beginning. Heavily involves one of my major original characters (Katya).
Crossover - Castle & Forever - Rated: T - English - Supernatural/Mystery - Chapters: 16 - Words: 27,521 - Reviews: 23 - Favs: 6 - Follows: 9 - Updated: 3/20 - Published: 2/7 - Rick C., M. Fallon, Henry M., Abe
Not Just a Cop by J.D. Cunegan reviews
Kate Beckett is one of the NYPD's brightest homicide detectives, but she also harbors a dark secret - one that not even she was aware of until recently. She leads a double life of sorts, subjecting herself to horrors and conspiracies unlike anything else in the world. And once she saves bestselling author Richard Castle from certain death, things get even hairier.
Crossover - Buffy: The Vampire Slayer & Castle - Rated: T - English - Supernatural/Mystery - Chapters: 11 - Words: 25,705 - Reviews: 38 - Favs: 20 - Follows: 46 - Updated: 3/17 - Published: 1/29 - Angel, Faith L., Rick C., Kate B.
Law and Authors by Rhonda Roo reviews
Booth and Bones are sent to New York to work with Beckett and her team. Beckett worries that an FBI agent will send Castle home and she hates working with FBI because they always want to send Castle home. But this case is difficult and she knows she needs her partner there. Booth wants to help them solve it and takes the one person with him that he knows can help, Bones.
Crossover - Bones & Castle - Rated: T - English - Friendship/Romance - Chapters: 2 - Words: 5,754 - Reviews: 14 - Favs: 21 - Follows: 35 - Updated: 3/17 - Published: 1/23
Dial M for Magic by The Paradigm Shift reviews
A Magical Detective Yue story! Instead of working alone, however, our heroine teams up with the NYPD 12th Precinct Homicide Detectives to solve a puzzling murder involving magic, crime, and politics, all the while trying to hide the existence of mages from the police. Unfortunately, Castle finds out much sooner than Yue had hoped. Hilarity Ensues. T for language, no pairings.
Crossover - Negima! Magister Negi Magi/魔法先生ネギま! & Castle - Rated: T - English - Mystery/Humor - Chapters: 24 - Words: 34,045 - Reviews: 19 - Favs: 10 - Follows: 8 - Updated: 3/15 - Published: 12/2/2013 - Chisame H., Yue A., Rick C., Kevin R.
A Demi-gods Crime by I am the Skai reviews
A demi-god is murdered in New York while trying to find Percy to tell him important news. Now its up to Annabeth, Percy and the NYPD's finest decetives to find the killer. Set after the Gaea/giants war.
Crossover - Percy Jackson and the Olympians & Castle - Rated: T - English - Crime/Friendship - Chapters: 20 - Words: 28,101 - Reviews: 55 - Favs: 65 - Follows: 76 - Updated: 3/14 - Published: 6/26/2013 - Annabeth C., Percy J., Rick C., Kate B.
Close Encounters of the Fourth Kind: Clash Of Worlds by OnkelJo reviews
After settling into my new life in the Castleverse, I thought I could catch my breath. I rarely was so wrong. I have to work with unexpected allies who shouldn't even be here to stop the world we know from unraveling. Just my luck, eh? Castle Winter Hiatus 2014 Ficathon Entry. Castle/Chuck/Eureka. Humorous Self Insert (SI) with actual plot ;) Cover Art by the lovely @dtrekker :)
Crossover - Chuck & Castle - Rated: T - English - Sci-Fi/Humor - Chapters: 8 - Words: 20,841 - Reviews: 6 - Favs: 8 - Follows: 9 - Updated: 3/10 - Published: 12/11/2014 - Chuck B., Alexis C., OC, Rick C.
Grimm Reflections by The Black Sluggard reviews
A close call on the job exposes a hidden world that has always existed just out of sight―and leaves Kevin Ryan viewing the people closest to him in a whole new light... Sequel to "Until Lambs Become Lions". Slash, Ryan/Esposito. WIP
Crossover - Castle & Grimm - Rated: T - English - Romance/Fantasy - Chapters: 5 - Words: 15,065 - Reviews: 4 - Favs: 2 - Follows: 8 - Updated: 3/10 - Published: 2/9 - [Kevin R., Javier E.] Nick B., Hank G.
Ensemble, plus fort que tout by KeiraAlexander reviews
Ce n'est plus une famille, que nous formons, Kensi. Tant que ces suspicions flotteront dans l'air, tant que chacun suspectera l'autre, nous ne serons plus une famille; rien qu'un groupe de personnes assez crédules pour se croire unis par la seule chose qu'ils partagent ensemble: la bêtise de se croire liés. Cross-over entre 3 de mes séries préférées! Venez lire ;)
Crossover - Castle & NCIS: Los Angeles - Rated: K+ - French - Romance/Drama - Chapters: 9 - Words: 9,511 - Reviews: 8 - Follows: 2 - Updated: 3/8 - Published: 1/19 - Kate B., Kensi B.
Once Upon A Castle by 3detectives1writer reviews
When Castle and Beckett catch an odd case, Castle finds a story book that leads them to Storybrooke. Set in Season 3 Castle and Season 4 of OUAT. (Fic cover edited by myself)
Crossover - Castle & Once Upon a Time - Rated: T - English - Mystery/Fantasy - Chapters: 13 - Words: 17,266 - Reviews: 35 - Favs: 20 - Follows: 47 - Updated: 3/6 - Published: 11/6/2014 - [Kate B., Rick C.] Emma S., Snow White/Mary M. Blanchard
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: 6 - Words: 14,540 - Reviews: 3 - Favs: 9 - Follows: 8 - Updated: 3/5 - Published: 10/8/2014 - Kate B., Rick C., Lux C.
I ate'nt dead! by Kylestra
The body was that of a little old lady dressed completely in black and even in her prostrate position a black pointy hat was fitted firmly on top of her grey hair. On top of the body lay a placard on which, scrawled in bold black letters, was the message: I ate'nt dead!
Crossover - Discworld & Castle - Rated: T - English - Humor/Fantasy - Chapters: 1 - Words: 1,138 - Published: 3/5 - GrannyWeatherwax, Rick C., Kate B., Lanie P. - Complete
Jedi Castle by The Dark Scribbler reviews
Rick Castle has had a hell of a day. Kidnapped, then rescued by a mysterious hooded figure...
Crossover - Buffy X-overs & Castle - Rated: K - English - Adventure/Humor - Chapters: 4 - Words: 7,329 - Reviews: 30 - Favs: 53 - Follows: 37 - Updated: 3/3 - Published: 7/21/2014
Pictures of Home by Mountain King reviews
The Captain left a lot more behind than he realised when he crashed in the Arctic. Now he finds out just what that is and finds a family in need of his help. As for Richard Castle, his family tree has just got a lot more interesting.
Crossover - Castle & Captain America - Rated: T - English - Adventure/Family - Chapters: 1 - Words: 1,929 - Reviews: 10 - Favs: 8 - Follows: 12 - Published: 3/2 - Rick C., Steve R./Capt. America
A Whole New Rulebook by Time-Travelling Llama reviews
I have been watching a lot of Castle lately and I am addicted to Doctor Who and so this happened. When Castle and Beckett lose their case a strange turn of event leaves them stranded with The Doctor. I hope you like it :) and I'm sorry I'm not as good as Castle! :) Also this pre 47 seconds since series five hadn't aired in the UK but now it has :)
Crossover - Doctor Who & Castle - Rated: K - English - Sci-Fi/Adventure - Chapters: 20 - Words: 20,410 - Reviews: 32 - Favs: 21 - Follows: 31 - Updated: 2/27 - Published: 3/7/2013 - 11th Doctor, Jack H., Rick C., Kate B.
Serial Killings That Aren't by Writing Fangirl for hire reviews
Castle and Beckett are investigating what appear to be a series of strange unnatural serial killings. Dean and Cas are investigating the same killings, but they know what's going on. Will the police and the hunter and angel be able to work together to crack this case?
Crossover - Supernatural & Castle - Rated: T - English - Humor/Romance - Chapters: 7 - Words: 7,091 - Reviews: 9 - Favs: 6 - Follows: 15 - Updated: 2/26 - Published: 6/26/2014
The League of Red-Headed Women by Pegship
Someone has been kidnapping women on the island of Manhattan - women with something special in common - and their friends and family team up to find them. Friends and family who happen to be members of the Avengers, the NYPD, and one novelist with an overactive imagination. This crossover includes characters from not only Castle and The Avengers, but also the TV show The Unusuals.
Crossover - Castle & Avengers - Rated: T - English - Humor/Drama - Chapters: 1 - Words: 3,565 - Favs: 1 - Published: 2/25
Friend in Me by qjhayes11 reviews
One shots of the friendship between Kate Beckett and Jane Rizzoli. Everything from sports rivalries, and hilarious moments to family trouble and fighting for their lives in the ER. In series fun from both Castle and Rizzoli & Isles. Episode Titles for placement.
Crossover - Castle & Rizzoli & Isles - Rated: T - English - Friendship/Family - Chapters: 10 - Words: 44,561 - Reviews: 23 - Favs: 17 - Follows: 27 - Updated: 2/20 - Published: 10/25/2014 - Kate B., J. Rizzoli
Paths Crossed by CrimeShowFanatic reviews
It's been two years since Ziva left. Since then, Tony hasn't been himself. What will he do when he finds out she's in New York living with the one and only Richard Castle. Little does he know she has a surprise for him.
Crossover - NCIS & Castle - Rated: K+ - English - Crime/Family - Chapters: 11 - Words: 17,109 - Reviews: 24 - Favs: 25 - Follows: 49 - Updated: 2/17 - Published: 5/6/2014 - Tony D., Ziva D., Rick C., Kate B.
Unsuspecting by Saunders2 reviews
(Title Change) Three cases, three years. Always the same. I'm struggling to find the connection between all three- and I may have it. I now have the NYPD looking for my three missing people and we're looking desperately. Why they sent homicide detectives? I don't know. But I do know that my name is Derek Souza and my partner has been sent a letter saying, 'I know where you are.'
Crossover - Darkest Powers & Castle - Rated: T - English - Mystery/Romance - Chapters: 2 - Words: 2,577 - Reviews: 1 - Favs: 1 - Follows: 2 - Updated: 2/14 - Published: 11/3/2014 - Chloe S., Derek S., Rick C., Kate B.
Sunny Side Up by Telemain's Daughter reviews
A serial killer strikes during a spring break heat wave in NYC. When the FBI gets involved, can Beckett and the boys learn to work with Special Agent Teresa Lisbon and her unconventional partner before the killer gets away with murder? Mentastle. Caskett and Jisbon.
Crossover - Mentalist & Castle - Rated: T - English - Mystery/Romance - Chapters: 1 - Words: 1,145 - Reviews: 6 - Favs: 9 - Follows: 16 - Published: 2/12 - Patrick J., Teresa L., Rick C., Kate B.
Le Retour du Triple Tueur by Leelou67 reviews
Crossover Castle / Winx. SVP ne tirez pas sur l'auteur :-). Le Triple Tueur revient, plus déterminé que jamais. L'équipe de Kate est sur l'affaire, mais cette fois, elle a du renfort.
Crossover - Winx Club & Castle - Rated: K+ - French - Hurt/Comfort - Chapters: 1 - Words: 4,643 - Reviews: 3 - Favs: 1 - Published: 2/8 - Stella, Musa, Aisha/Layla, Kate B.
The Essence Of Existence by BWjournal reviews
What happens when your beliefs are questioned? When everything that you held as true changes in the most unexpected of ways? Will you hold that hand until the end? Set on December 2012 - Midway Season 5. Written for DancingDragon42 for the Secret Santa Fanfic Challenge 2012.
Crossover - X-Files & Castle - Rated: T - English - Sci-Fi/Adventure - Chapters: 42 - Words: 169,789 - Reviews: 234 - Favs: 29 - Follows: 43 - Updated: 2/7 - Published: 12/20/2012 - F. Mulder, D. Scully, Rick C., Kate B. - Complete
Closing Pandora's Box by Jedi Buttercup reviews
Alexis has learned the truth: that her dad legitimately gets his capriciousness from both sides of his ancestry.
Crossover - Percy Jackson and the Olympians & Castle - Rated: T - English - Chapters: 3 - Words: 6,822 - Reviews: 49 - Favs: 136 - Follows: 53 - Updated: 2/5 - Published: 4/18/2010 - Apollo, Kate B., Alexis C., Martha R. - Complete
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