Castle & Beckett try to make their way through a very different world. AU.

Caskett soulmate AU one shot

"Sorry. I didn't know." Something in his tone causes the "now you do" she had prepared in response to die on her lips. It prickles the back of her mind, the cold wash of guilt she hears in just four words, and she hits the emergency stop on the elevator control panel and whirls on her shadow. "What'd you do?" - An alternate look at A Death in the Family. Pre-Caskett

An AU story set in mid to late season five.

This story begins just before the kiss in Knockdown. Only in this version, Rick admits his feelings for Kate and she is forced to respond.

It's Castle's birthday, and one of his gifts is that his little girl is moving back home…without Pi in her life. He didn't think he could be happier. (Very AU after the May 3 episode and finale. LOL One of those stories that was intended to stop around chapter 3 or 4 but wandered off on its own.) Involves family, some excitement, and so much fluff I should be ashamed.

A summer ficathon entry: Kate and Rick on their honeymoon after the events of my last story, A Guiding Light. The dragon has been slayed and there is life to be led. But can it ever be that easy for these two? AU after events of 6x22.

Entry for the 2022 Summer Ficathon. AU for Season 4. Castle and Beckett begin dating following the conclusion of the Lee Travis case. Sequel to the story 'Breathe Again.'

An AU story during the early stages of Kate and Rick as a couple

An AU story where Kate is lying in her hospital bed after being shot at Montgomery's funeral. She is dying. But help intervenes in the form of a Celestial Mechanic who takes over her recovery. Not always to Kate's liking.

This is a continuation of a story from the Succubus series. Called Prisoners, chapter 24. It will be necessary for you to read that first. It is located in the M rated material. - COMPLETE

Ebullition by Castlefan6 Authors Note: This is AU; Kate's mom was never attacked and is still alive! This resulted in Kate's dad never falling into alcoholism and Kate is quite close to both her parents although having her own apartment. ebullition - a sudden outburst of emotion or violence:

An AU story that takes place about 5 years after Kate's undercover assignment at Belmont Women's Prison.

Castle is not what he seems. He is not…human. Neither is his family. When Kate is kidnapped and turned to be what he is Castle knows this means war. As a Vampires Mate are scared and the Mates Vampire who finds their Mate harmed can take revenge if it under the right conditions. Can Castle help Kate adjust to this life? And what about who took her?...

Between her daughter and her career, single mother Kate Beckett has no time to date. But when she meets a handsome - and oddly familiar - man in a cafe, she starts to think that their burgeoning friendship might not be enough. A 2022 Castle Ficathon entry.

There comes a time in every person's life when they come to a fork in the road, and must choose which path to travel. But they never know where the choice will take them. So what happens when Alexis faces the fork much earlier than expected? Will she choose a path that makes sense? Or one full of all sorts of twists and turns? Only fate will tell.

A season 5 AU story where Kate is recruited to go undercover at a women's prison to get information from the girlfriend of a Russian gang leader.

Castle finds himself walking a very different path. Beckett finds herself having to fight for a place by his side. Oh yeah, and a serial killer too. For good measure. Warning: Depression and Self Harm. Sequel to Wolf Moon Rising

A follow up to A Gift from the Great Pumpkin. Johanna had long ago given up the dream of having her daughter's family gathered around her table for Thanksgiving…but this year, with a new grandchild and relatives seemingly ready to mend fences; it looked like she might get the holiday she had always wanted. Written for Castle Winter Ficathon 2021. Johanna Verse Story.

This is my take on how things would continue on Season 9, after this first chapter it’s completely AU and how I think season 9 would’ve/ should’ve went!

Set just after season eight of Castle, Kate is asked to do a small favor for Don Vorleone, the Vorlagfather. He'd also like Martha to direct some of Shakespeare's plays on his home world. What could possibly go wrong?

Kate gets Rick to sleep

After the bombing in the episode "47 Seconds" - when Castle realized Beckett had been lying to him. But here they both realize how much is at stake and behave like grown-ups. He confronts Kate, and they manage to have a productive, adult conversation.

"The perfect words were simple. 'I love you.' If only blurting them out less than a month after meeting for the very first time wasn't needy, ridiculous, and a red flag for any relationship, ever." A S1 AU for the Castle Ficathon 2022.

What if Season 8, Episode 3's Beer Pong challenge ended with Kate taking drunken Rick back home. And, what if Rick wasn't really drunk, after all?