Long Ass Notes:

Hi. Thanks for the reviews. I know this story might belong in the Crossover section, but this is mainly a Castle story with the fact that Castle is Harry, now that'show I justify it but there's another reason, not many people are actually looking for a Crossover between Harry Potter and Castle, hell I was never looking for it either. My understanding of Fanfiction on sites is that you have tons of mediocre to shitty stories with hidden gems in it and you can spend years with a good story buried in here that you never even knew you needed but there it was just waiting for you to find it.

Now not to harp on about Archive of our Own but if I were to post this ficthere it would be listed automatically in both Castle and Harry Potter sections so fans of both Fandom would be able to have access to it. I'm just allowing most of you to find this story easily enough.

That being said if I am unknowingly breaking some sort of rule, posting this Crossover story in just one Fandom then please inform me and I will promptly take it down, and those who want to read it can access it on Archive of our Own, just search for my name which is the same as in this site.

Now the reason for the frequent updates and posting of multiple stories have been addressed in Chapter Two of my other story There and Back Again, if you have concerns you can check there and get back to me with your feedback.

Not to harp on and on and on but this chapter just like the first one is sort of a summarized account until the end of Season Three where I really get into the story I want to tell, so actual conversations will be limited and most of the first two seasons will go like a blur. Sorry if that bothers you. Also sorry if this bloody long authors note bothers you, it definitely bothers me but some things were needed to be said. I promise to limit these as I go along.

Thanks for all you reviews, follows and author alerts once again. It's always appreciated. Now onto the next chapter.

Chapter Two

Two weeks later he was shadowing Kate Beckett everywhere and the more time he spent with her the more enamored he got. He couldn't help it, she was the most intriguing person he had ever met and she surprised him constantly. He called her his muse and briefly toyed with the idea that she actually was one but they were not a physical entity and rarely interacted with the masses.

He didn't ever reveal himself but he started imagining a future where she was with him and they were family. He couldn't help helping her out in any way possible, anything he could help speed up with magic he did without thinking of consequences.

That first case with Harrison Tisdale he used his focus ring to unlock the cuffs tethering him to her sedan then kept the safety on his gun off the entire time he was aiming his gun at the Detective.

In the Nanny murder case he sussed out through covert Legilimency that Chloe's boss was sleeping with both Chloe and the victim so he went to investigate his bathroom cabinet. He was ready to throw up a shield should Chloe attack Beckett but she proved herself a capable negotiator and disarmed Chloe showing a sense of empathy that touched him deeply.

When investigating the school kids who had been playing with a loaded gun he didn't have to apply any of his magical skills, even though he was tempted to Crucio their perp Brandon for even thinking about Beckett in that way, so he honed his investigation and Interrogation skills and proved himself to the slowly thawing Detective.

When he found out about her mother's murder his heart broke for her and he wished he could share his own experience of finding out that his parents were murdered and then the experience of finally being able to avenge them but that would open a can of worms that he wasn't sure he could ever put the lid back on again.

When she found out about his meddling in her mother's case, she went ballistic and sent him packing. He hated that he had hurt her but knew that while she might be mad, she like him would do anything to find closure. Losing a parent took out a chunk of you. He himself found out ten years later that his parents were murdered and yet it affected him so deeply that he tried to avenge the at eleven years old, against an evil entity he had no chance of besting. It made you reckless and he had a feeling that the Detective knew a too well how out of control the quest for vengeance made her, and so he assumed that she had shut it down, before it destroyed her. Her reaction at his actions were more about her than him so he decided to wait her out in the mean time; he wasn't done with his own investigation .

A beam of red light hit former Detective Raglan in the back and he fell in a heap outside the bar had been drinking in. He rushed over to the fallen man and checked his pulse; his lowest powered Stunners usually left wizards reeling for days. On muggles, especially one with a weak from alcohol heart; it could kill. He breathed a sigh of relief as he felt the blood pulsing beneath the filthy man's stubbled jaw and pulled out his wand, he pressed it against the man's temple and closed his eyes, he pushed into the unconscious muggles head and wading through the man's memories until he came to a few specific ones, with precise flicks of the splint of wood in his hand he extracted the memories, wisps attaching to the end of his wand, he guided them inside a spelled jar and sealed it after it was full.

He pointed the wand at the fallen man and whispered. "Ennervate," and he blinked his bleary eyes open, he gave Raglan a second before he whispered. "Obliviate," and his eyes went glassy. He stood up his work done and walked off pulling out his invisibility cloak. Next stop Sing Sing to see Joe Pulgatti and later; former Detective McAllister.

Kate took him back, it took work and he grovelled enough to check if his knees were bleeding. They worked cases closing them quickly and gaining a reputation as the best Homicide team on the force, he slowly but surely began to fall in love with the clueless Detective and started getting her coffee and a bear claw in the morning just to see her smile, he was tempted to slip in a little Pepper Up in her coffee on her bad days but he knew she would notice, especially if smoke started coming out of her ears.

All the while though he didn't stop his investigation, he knew she would be pissed but this was no longer about just her mother, there were tonnes more innocent people that had been affected by this case. If there was one thing he was good at, it was finding justice for the innocent. Kate had tunnel vision when it came to this case, he was looking at the whole and more and more the bigger picture began to form the more he realised that if any of his actions was detected Kate would be in danger and that would not be good, for anybody.

It all came to a head when they were called in for Jack Coonans murder and subsequent questioning of Vulcan Simmons, finally figuring out that it was Dick Coonan, Jacks own brother who had murdered him and also murdered Johanna Beckett all those years ago.

The confrontation didn't last long, Coonan held him at gun point and Beckett refused to shoot him, he jetted his head back and broke Coonans nose, Coonan faltered and loosened his grip and Kate went for the kill, and time stopped still. Not through magic but just in his mind; he had a choice to make, he had a future with Kate planned and for that she needed closure and if she killed Coonan she wouldn't get any answers and it would be his fault, she wouldn't blame him but the resentment would be there and who knows how far back that would set them so he raised his hand and whispered his favourite charm.

"Accio," and the bullet sailed towards his hand and impacted in his forearm, the force of it swinging his focus ring hand towards Coonan, he didn't miss a beat firing off Expelliarmus silently sending Coonans gun sailing through the air, it clattered on the floor several feet away and he fell forwards knocking Coonan down with him and landing a punch on his jaw with his still working hand.

Beckett's yell of "Castle!" had him smiling despite the pain as Esposito and Ryan rushed Coonan pulling his hands behind his back even as Kate came over to him and rolled him off Coonan.

She winced at the bleeding arm, the wound spurting copious amounts of blood. "C-Castle," she gasped hauling his head into her lap. "What'd you do that for?" she scolded as she looked from him to Coonans struggling form.

He blinked through the pain. "Y-You need answers," He groaned out and twisted his head to look at Espo and Ryan. "Stuff some thing in his mouth, c-cyanide p-p-" he sagged against Kate again the pain pulsing through his arm, Merlin help him he'd rather be hit with Dobby's Bludger again. That fucking hurt!

Espo nodded quickly grabbing a used newspaper from a bin nearby and stuffing it into Coonans mouth. "Yeah, bro. Thanks I got it."

Kate was smoothing a hand through his hair whispering that she was grateful and that she was sorry and he was feeling okay one minute and then delirious the other.

That was the day that he discovered that Muggle anesthetics do not work on wizards. The excruciating pain he had to endure due to being knocked out, but feeling all the effects of the surgery to his arm was possibly worse than being under the Cruciatus for a whole minute. It was thanks to Minerva's quick thinking that she managed to slip him a pain relief potion as soon as he was released from the hospital.

The next morning they found Dick Coonans body in a pool of his own blood, half of a razor blade buried in his neck.

The next few weeks were harried as Kate was in a mood and anyone who stayed around her too long got to feel her wrath. Anyone except strangely him, Kate excused him everything except when he got too annoying, instead it seemed to be his coffee that made her smile, his prodding that made her go have lunch and his insistence that made her sigh and close the case files shut down her computer and go home.

A month after the 'Incident' as he taken to calling it in his head Kate was back to her normal, if slightly reserved, self and had taken to once again throwing herself fully into cases and nailing down suspects left and right. Her demeanor towards him changed though; she started to seem more accepting of his wild theories and was always willing to smile at his goofy antics and jokes. It was a refreshing change but he was curious as to what had caused it.

He was now daily perusing Raglan and McAlisters memories going back and forth trying to figure out a connection. He had also discovered a disturbing information; Raglan and McAllister ran with a rookie cop back in the day and it seemed that he was involved in all of their schemes and that rookie cop was now Captain of the twelfth and a long time friend of his. He hated suspecting Montgomery of these things but the pensieve memories spoke for themselves, there was unfortunately nothing left for it, he had to know. He opened up his hidden cabinet with a burst of focused magic and pulled out a vial of clear liquid.

He made sure that Minerva and Alexis were out for the day and asked Captain Montgomery to meet him at his loft to discuss something important.

Roy arrived right on time and he handed the older man a beer setting his own down on the coffee table, the first sip worked and his face went slack the bottle falling to the floor before he summoned it to himself setting the placed bottle down next to his own.

"Roy Montgomery, what do you know about the murder of one Johanna Beckett... "

And it all came spilling out, the three cops kidnapping mobsters for ransom to the undercover agents shooting and the subsequent involvement of then ADA William H. Bracken. Then there was the blackmailing and what led to Johanna's killing. Now Bracken was Senator and he used Raglan, McAllister and Montgomery's dirty money to get there. Merlin this shit was fucked up.

He gave Roy the antidote and wiped his memory, sent him home. So now he knew everything. But how was he going to tell Beckett?

Shorter End Note:

Seriously aren't you sick of these notes? ;-) Well Yay! He uses some magic to help. I know it was brief but there it is. Things will come to a head soon. In the mean time let me know what you think, yeah? It Helps loads, tons and any other large scale measure of weight you can think of. Tah!