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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: 49 - Words: 95,813 - Reviews: 102 - Favs: 41 - Follows: 57 - Updated: 2/20 - Published: 4/16/2014 - Rick C., Kate B., Captain America/Steve R., Agent Phil Coulson
The Hunter by bossybossninja
Garruk is on a killing spree, hunting for the plansewalker that cursed him. Will Kate and Rick with the help of Jace and Gideon save the day? Crossover between Castle and MTG, murder mystery. Written with: Netsrik1 -Thank you for helping me learn about Castle!-
Crossover - Magic: The Gathering & Castle - Rated: T - English - Mystery/Crime - Chapters: 7 - Words: 16,274 - Favs: 2 - Follows: 1 - Updated: 2/12 - Published: 10/26/2016
The Hunter by Netsrik1 reviews
Garruk is on the hunt for the planeswalker who cursed him. Showing up in New York City, he begins a killing spree. Castle and Beckett catch the case and try to make sense of it in their world. Will Jace and Gideon be able to convince Kate that magic does exist? Co-written with Bossybossninja.
Crossover - Magic: The Gathering & Castle - Rated: T - English - Fantasy/Mystery - Chapters: 7 - Words: 15,922 - Reviews: 10 - Favs: 5 - Follows: 6 - Updated: 2/12 - Published: 10/26/2016 - Garruk W., Jace B., Rick C., Kate B.
Quand le surnaturel et la réalité se font face by Leelou67 reviews
Il y a du grabuge dans la ville New-York. Mais pas n'importe quel grabuge habituel, où les flics se mettent à pourchasser un meurtrier. Plus du genre de Sam et Dean. Ils pensent être prêts à ce qui les attend là-bas. Grossière erreur.
Crossover - Supernatural & Castle - Rated: T - French - Supernatural/Crime - Chapters: 16 - Words: 34,005 - Reviews: 33 - Favs: 5 - Follows: 5 - Updated: 2/6 - Published: 6/5/2016 - Sam W., Dean W.
Un mystère, une enquête étrange! by blackwidow90legolas88 reviews
Trois meurtres ont été commis en une seule nuit! Plusieurs agences devront s'entraider pour résoudre ces trois crimes. Qui est ce tueur ou ces tueurs qui disparaissent sans laisser de trace?
Crossover - Bones & Castle - Rated: T - French - Adventure/Family - Chapters: 5 - Words: 6,420 - Reviews: 2 - Follows: 4 - Updated: 2/6 - Published: 4/23/2016 - [Kate B., Rick C.] [S. Booth, T. Brennan]
kairos by soulexpanding reviews
Her smirk is reassuring and, in spite of that, Kate shrugs, looking at the ground. She's powerless. It just took a cute, soft girl to turn her into a weak, timid mess. (Maura/Kate)
Crossover - Rizzoli & Isles & Castle - Rated: T - English - Romance/Friendship - Chapters: 11 - Words: 19,941 - Reviews: 22 - Favs: 9 - Follows: 19 - Updated: 2/2 - Published: 7/30/2016 - Kate B., M. Isles
A Call to Arms by Almariado reviews
When investigating a case, Kate and Castle cross paths with the FBI's Fringe Division, but in the least expected way. Set on season one of both shows.
Crossover - Fringe & Castle - Rated: T - English - Crime/Drama - Chapters: 6 - Words: 15,206 - Reviews: 5 - Favs: 6 - Follows: 10 - Updated: 1/27 - Published: 7/27/2014 - Olivia D., Peter B., Rick C., Kate B.
Stuck In the Moment by RachhBee reviews
Seeley and Kate are brother and sister. They are kidnapped for 5 years. They escape and need a place to stay, they find an abandon hotel. Can they survive in New York? Rated T for now. I am horrible at summaries. Please read.
Crossover - Bones & Castle - Rated: T - English - Adventure/Romance - Chapters: 4 - Words: 6,471 - Reviews: 7 - Favs: 10 - Follows: 16 - Updated: 1/21 - Published: 11/6/2013 - T. Brennan, S. Booth, Rick C., Kate B.
Daughter of Poseiden: Drowning in Dread by Psyche Castle reviews
"Peter Johnson" and "Anne Bell Cass" go to the 12th precinct helping solve the murder of their cousin. Kate and Rick don't know what to think of these 16 year olds barging in on them. Another thing that doesn't help is there may be a new demi-god going to camp soon. This takes place after all books and seasons of Castle.
Crossover - Percy Jackson and the Olympians & Castle - Rated: K+ - English - Humor/Mystery - Chapters: 5 - Words: 9,392 - Reviews: 3 - Favs: 1 - Follows: 2 - Updated: 1/16 - Published: 12/7/2016 - [Annabeth C., Percy J.] Alexis C., OC
Unsuspecting by Saunders2 reviews
(Title Change) Three cases, three years. All the same. I'm struggling to find the connection between all three. I now have the NYPD looking for my three missing people and desperately. All I know is that my name is Derek Souza and my partner has been sent a letter saying- 'I know where you are.' ABANDONED
Crossover - Darkest Powers & Castle - Rated: T - English - Mystery/Romance - Chapters: 3 - Words: 2,649 - Reviews: 1 - Favs: 1 - Follows: 2 - Updated: 1/14 - Published: 11/3/2014 - Chloe S., Derek S., Rick C., Kate B.
Out of Time by FifthAttempt reviews
Castle discovers a new talent: one that is terrifying and out-of-control. He has to find help before it kills him - or worse. Fortunately, or maybe not, a newly minted Sorcerer-Supreme shows up just in time, or is it out of time?
Crossover - Castle & Doctor Strange - Rated: K+ - English - Fantasy/Drama - Chapters: 1 - Words: 1,257 - Reviews: 2 - Favs: 2 - Follows: 4 - Published: 1/11
Remember by ChapmanM95 reviews
A one night stand gone wrong. Beta read by Kangaruby.
Crossover - Castle & Law and Order: SVU - Rated: T - English - Romance/Angst - Chapters: 23 - Words: 27,950 - Reviews: 12 - Favs: 10 - Follows: 33 - Updated: 1/10 - Published: 2/9/2016 - E. Stabler, O. Benson, 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: 18 - Words: 68,113 - Reviews: 27 - Favs: 13 - Follows: 23 - Updated: 1/1 - Published: 10/8/2014 - Kate B., Rick C., Lux C.
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: 26 - Words: 41,527 - Reviews: 64 - Favs: 59 - Follows: 99 - Updated: 12/25/2016 - Published: 11/6/2014 - [Kate B., Rick C.] Emma S., Henry Mills
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: 18 - Words: 42,508 - Reviews: 20 - Favs: 25 - Follows: 38 - Updated: 12/23/2016 - Published: 12/11/2014 - Chuck B., Alexis C., OC, Rick C.
The Tyranny of a Rational Mind by Saul Good reviews
Alexis and Castle approach a problem with logic.
Crossover - Buffy: The Vampire Slayer & Castle - Rated: T - English - Adventure/Family - Chapters: 6 - Words: 11,421 - Reviews: 14 - Favs: 23 - Follows: 51 - Updated: 12/20/2016 - Published: 3/30/2014 - Rick C., Alexis C.
Richard Castle, Watcher by Starfox5 reviews
Richard Castle did follow his girlfriend Kyra Blaine to London when she left him, and his life changed one evening in a pub there. He didn't know that joining a group of vampire hunters would one day lead him to Sunnydale, and later to the 12th Precinct.
Crossover - Buffy: The Vampire Slayer & Castle - Rated: T - English - Adventure/Humor - Chapters: 21 - Words: 165,847 - Reviews: 73 - Favs: 175 - Follows: 208 - Updated: 12/17/2016 - Published: 8/8/2015 - [Rick C., Kate B.] Buffy S., Vi
The Wizard and the Writer by Shinysavage reviews
Murder is run of the mill to Richard Castle and Detective Kate Beckett. But when their newest case arrives with some intriguing anomalies, they might have to request help from an entirely new kind of expert. Written for DLP's Secret Santa 2015. Set mid-series Castle season 4, post-White Night for Dresden.
Crossover - Dresden Files & Castle - Rated: T - English - Mystery/Humor - Chapters: 2 - Words: 5,990 - Reviews: 14 - Favs: 22 - Follows: 53 - Updated: 12/1/2016 - Published: 2/1/2016 - H. Dresden, K. Murphy, Rick C., Kate B.
Girl Meets Castle by tracey.costelle reviews
Maya works with Beckett and the gang, she hasn't spoken or seen Riley in 4 or 5 years, and has no family left except Lucas and the gang at the 12th precinct. Maya is turning 21 and the GMW gang get back together, but not for what they originally planned. it will include most characters from both shows. DISCLAIMER: i do not own Girl Meets World or Castle
Crossover - Castle & Girl Meets World - Rated: T - English - Chapters: 8 - Words: 12,211 - Reviews: 3 - Favs: 8 - Follows: 11 - Updated: 12/1/2016 - Published: 12/2/2015 - Kate B., Alexis C., Maya H., Lucas F. - 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: 6 - Words: 10,888 - Reviews: 47 - Favs: 107 - Follows: 88 - Updated: 11/3/2016 - Published: 7/21/2014
Not Your Average Case by superwhofilesjackson reviews
While on a hunt, the Winchesters meet (more like have an unpleasant encounter) Beckett and team. For supernatural, it takes place in season 5, and for castle, some where in season 4. rated T for safety. *my summaries suck. just read the story!*
Crossover - Supernatural & Castle - Rated: T - English - Supernatural - Chapters: 8 - Words: 14,230 - Reviews: 25 - Favs: 29 - Follows: 58 - Updated: 9/26/2016 - Published: 7/21/2015 - Sam W., Dean W., Rick C., Kate B.
Infinite Kates by ucsbdad reviews
A sort of a sequel to Interrogation of a Vampire, featuring characters from Castle, The Librarian, 24, CSI Miami, The Spirit, and Stiletto. COMPLETE!
Crossover - 24 & Castle - Rated: K - English - Adventure/Supernatural - Chapters: 6 - Words: 12,349 - Reviews: 40 - Favs: 8 - Follows: 9 - Updated: 8/15/2016 - Published: 8/10/2016 - Rick C., Kate B.
That's Not My Name by amazingakita reviews
an alex rider and castle crossover, standard stuff. i haven't touched this in years, please don't look too hard at it
Crossover - Alex Rider & Castle - Rated: T - English - Adventure - Chapters: 5 - Words: 7,055 - Reviews: 3 - Favs: 10 - Follows: 16 - Published: 8/4/2016
Ties That Bind by superlc529 reviews
Two bodies. Two murders, but they're connected. One body is in the jurisdiction of Castle and Beckett and the other Henry Morgan and Jo Martinez. They have to work together to find the killer. What could possibly happen when these two sets of partners join forces?
Crossover - Castle & Forever - Rated: T - English - Chapters: 7 - Words: 12,859 - Reviews: 27 - Favs: 25 - Follows: 17 - Updated: 8/3/2016 - Published: 7/15/2016 - Rick C., Kate B., Henry M., J. Martinez - Complete
Deep and Unsettling Silence by the Night Phoenix
Some of us are born to love silently. Johanna Katherine Castle learns this the hardest way.
Crossover - Castle & Good Wife - Rated: K - English - Angst/Romance - Chapters: 1 - Words: 420 - Published: 8/1/2016 - [OC, OC] Rick C. - Complete
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