Thanks to Jill (jstar1832), encantandaa, and Jan for all their help and support!

On their way from the book party to the precinct for interrogation

"Right this way Mr. Castle." Kate said as she led him to the police car parked at the front of the building that was waiting to take them to the 12th Precinct.

"I didn't kill anyone did I?" Castle asked as they entered the car. Kate rolled her eyes, scoffing at his remark. Already she could tell that this wasn't going to be easy. Judging by the way he'd behaved in just the past five minutes, she could tell that he was not going to take any of this seriously, despite just how important it all was. He had probably had a little too much to drink, too, and that wouldn't make interviewing him very easy.

"I don't know Mr. Castle, did you?" Kate retorted, glancing at him in her rearview mirror.

"Not to my knowledge, no, but it has been a wild night."

Kate put the siren on to drown him out and also to get to the station, and therefore this interview, over with as quickly as possible. "Mr. Castle, something very serious has happened here tonight and it is not in your best interest to make jokes or take it lightly. Do you understand?"

"Yes, of course, sorry," Castle apologized. You'll have to excuse me, I've had a long day and this was not what I was expecting tonight. As lovely as you are, I didn't think the handcuffs would be coming out until later."

Kate acted as though she hadn't heard him, and she continued ignoring him for the rest of the ride to the precinct. Obviously whatever she said to him was just going to evoke yet another smartass quip that she was not prepared to deal with. Not until she was in her interrogation room, playing by her rules.

After driving in silence, they finally reached the 12th. Kate instructed the officers accompanying her to bring Castle up into interrogation while she stayed back.

Castle immediately looked at her, concerned. "Don't worry Mr. Castle, I'm just going to ask you a few questions," Kate said before he had the chance to speak. "I'm sure you have nothing to hide."

On their way from the precinct to see "death of a prom queen" crime scene.

They rushed down the stairs as quickly as they could, jumping into Kate's police cruiser. They'd need to get downtown as fast as possible.

"Did they say who died or how?" Castle asked Beckett, quickly going through all of his death scenes in his head. "Girl, guy, shot, stabbed?"

"Nope, not many details yet. We'll find out when we get there." Like Castle, Kate was running through every murder scene from his books she could think of. None of them seemed like good options for the victim, especially since the writer tended to use graphic language.

"You know Castle, while I know you had good intentions in 'jumping the line' for our prints, we're not really in the business of trying to make enemies with the rest of the precinct. So if you insist on staying until the case is solved, do you think you could at least follow the rules?"

"I was never a big fan of rules. They get in the way of all the fun," Castle said. "Besides, what's the use in having connections if you can't use them to help solve mysterious murders? Not to mention the quicker we solve this case the quicker you get rid of me, right?"

The traffic began to stack up, and Beckett switched the siren on. They weren't that far from the crime scene anyway.

"So who was that young redhead you were talking to at your book party Castle?"

"Why, jealous?"

"Of a teenager vying for you affections?"

"That would be my daughter Alexis."

"Wow, a teenage daughter. Didn't peg you for the doting father type."

"Oh come on, you know I have a daughter…it's always listed in the 'about the author' section of my books," he said smirking at her.

Kate ignored his comment, pausing before she spoke again. "But she seemed so…sweet. How is that part of your DNA? Should we run some tests in the lab?"

They pulled up to the building where the crime had occurred. As they got out of the car, Beckett glanced over at Castle and rolled her eyes. Maybe he'd actually have something to contribute to this one.

On their way from the precinct to arrest Kyle Cabot

"So you really think you have the right guy?" Castle asked her as they jumped into the car on their way to Brooklyn to arrest Cabot.

"Well he matched the print Castle. Are you looking for something else?"

"No, just trying to get inside your head Detective Beckett…just trying to understand the thoughts of a real life NYPD officer just before she makes an arrest."

"Well, stay out of my head Castle. It's much too complex for you," Kate responded as she took a quick right turn, the siren blaring.

"Oh I don't know about that Detective. I think if we spend enough time together…"

"Luckily, that won't be happening." She took another sharp turn, which seemed to be on purpose, as Castle held on to the door as to not go flying about.

"I think you'd appreciate the help I can give on investigations. I'm very good as solving crimes, as I'm sure you know from my novels." Castle was having an immensely good time teasing this woman. He wasn't even sure if he wanted her to like him, or continue to be pissed off by him – which would be more enjoyable?

"Castle, right now the only thing on my mind is catching this guy, and I need to concentrate on where we're going, so if you don't mind…" Kate snapped, turning another corner, "can you please shut up?"

At that moment he smirked at her, locked his lips, and threw away the key.

On their way from the library to the precinct, after he was arrested.

"So Detective…have you thought about what I said? You have the wrong guy." Rick was currently sitting in the back of the detective's car. Neither one had said a word almost the entire way back to the precinct.

"Actually Castle, no I haven't thought about what you said because you are not a cop. You are not a detective. You are just a writer who has no business even helping with this case…especially after what you just did."

The truth was, she had been thinking about what he said to her in the library upon his arrest. Castle was good…and she couldn't just ignore his ideas based on pride. Could she?

"Oh come on…I've been very helpful so far! Especially with this! Please, just hear me out, you won't be sorry. Scout's honor!"

"I thought you were never a scout."

"Did I say that?" he said, and she saw him wink through the rearview mirror.

They parked at the precinct and he was led by the other officers out of the car and into the holding cell. Kate looked at him one more time before she told him he could make his call and walked away, still pondering his theory on the case.

After questioning Jonathan Tisdale, on the way to see Harrison Tisdale

"So there's no keeping you out of this case is there? Even after you were arrested, you just don't care about following the rules…" Kate commented as they got in the car on their way to see Alison Tisdale's brother Harrison.

"I'm just looking for justice Detective, same as you."

"Yeah right, you're just looking for a good story for your next book….now that you killed off Derrick Storm." Kate took a glimpse in the mirror before pulling back out on the streets of NYC.

"The fan in you is showing again Detective. The book's only been out for two days, how do you know the ending? Must have been those rumors you've been reading on the internet fan pages."

Kate scoffed as she looked at him, and then turned her eyes back on the road trying to hide her smile.

"Don't worry Detective, I won't tell anyone your secret. It is oddly strange how we both wound up at the same apartment this morning though, isn't it? It's like fate. I knew you'd listen to my theory."

"Yeah well, if it helps the case I'll listen to any reasonable ideas…even if it comes from you. That's my job."

Castle couldn't help but smile as he looked out the window of the car…

After questioning Harrison on their way back to the precinct

"What? I was right!"

"Right about what? That Cabot wasn't guilty? We knew that already." Kate ignored him as they started to drive back to the precinct.

"If it wasn't for me, he'd be in prison right now and this guy would be free!"

"Castle, you should quit while you're ahead. You believed this guy. If it was left up to you, we wouldn't have caught him. Way to pick up the clues, master detective," Kate teased.

"I would've figured it out eventually," Castle said, defending himself. "I just needed a chance to look at all the evidence laid out. Point is, I was right."

"Keep telling yourself that Castle."

On their way to the courthouse from the precinct

"How do you know Markway?" Maybe Castle's connections could actually come in handy with this.

"We play golf and poker together. Great guy. You see him a lot?"

"Only when he's signing off on warrants so I can catch criminals. We're not golfing buddies like you are." Kate was a bit sarcastic with that last bit. Slightly jealous…slightly annoyed at the same time.

"You should come sometime."

"Come where?"

"To play with us!"

"To your golf game with the judge? I think that might be a conflict of interest. Of…many interests."

"To a poker game!"

Kate looked at him and rolled her eyes. What was he thinking, inviting her out? As if she ever wanted to even see him again after this.

"Oh come on, it'd be fun! Wouldn't help to get on his good side either."

"Castle, unlike you, I have morals and integrity. I'd like to keep it that way, and keep my job, thank you. Let's just stick to the old fashioned way of the law ok? I get the warrant, and you keep quiet."

"My lips are sealed."

On their way to Harrison's apartment from the courthouse

"We're about to make an arrest, this is so exciting!" Castle was like a kid in a candy store, his dreams coming true, as they drove to Harrison's apartment.

"Yeah well, this is the scary part Castle, not the fun part. Guns, chases… not exactly the safest place for a civilian."

"Wait, you're gonna let me go in right? Please tell me you're gonna let me go in! We wouldn't even be this far if it wasn't for me."

Kate glanced over and after a few seconds of thought conceded. "You're right Castle, you should be able to go in. Just follow my lead."

The rest of the ride, Castle was on the edge of his seat, playing the upcoming events in his head. This was going to make a great book.

Meanwhile, Kate had the handcuffs ready to go…for Castle.