It's short. It's practically plotless. It's a Halloween fic. I'm an October baby - forgive me. Plus, I watched the Curse of the Judas Chalice today and couldn't get the image of Stana Katic with fangs out of my head.

Disclaimer: I own nothing.

"I want to suck your blood," She whispered salaciously in his ear as she pressed the plastic fangs against his jugular. His pulse quickened beneath the child's toy, however Rick Castle was nothing if not quick on his feet as he twisted away from the detective and resisted the urge to press a protective hand to his suddenly very exposed neck.

He gave the detective one of his patented 'make their knees weak' grins, "Funny, you said that exact same thing in my dreams last night but it had nothing to do with my neck."

"Castle," Her eye roll was practically audible as she removed the plastic mouth piece with her tongue, hooking them over her pointer finger, "you're so perverted."

"Thank you."

Kate Beckett sighed and flopped down in her desk chair, "So, what are you supposed to be?"

"The devil," Castle explained and grabbed the horned headband that he had tossed on her desk after it had slowly dug it's way to his skull.

"So, you're going as yourself?"

He rolled his eyes in turn, "You're hilarious."

"I thought so," She smiled.

"Thanks, actually," He crossed his ankles as he placed the headband back on, ignoring the pain it inflicted, "the devil is known for his charming good looks and debonair way."

"All while stealing the souls of men." She shrugged and propped her feet on the corner of her desk, grabbing their latest case file and opening it on her lap.

"Maybe," He let his eyes drift over her, "but this devil just wants to steal the heart of a certain woman."

"Look, Esposito, the parents are flirting again." Ryan told his partner as they walked into the squad room conferring over who was going to win the football game this weekend.

Javier smiled and elbowed his partner in the ribs, "Over case files to boot."

While Beckett glared them down, Castle interlaced his fingers looking them over, "Happy Halloween Gentlemen. By the way, if you're supposed to be the Witches of Eastwick you're still short a Cher."

"Shuddup, Castle." They mumbled in unison as they went to work.

Beckett chuckled as she ran her hand through her hair, "I want some coffee. You?"

"I could go for a cup."

"I've got it." She tossed the file back on the desk and stood up. As she walked around him, she dipped to whisper in his ear, "Tell the devil he's already stolen it."

He stared blankly as she sauntered off toward the elevator, the doors dinging like a light bulb flicking on over his head. Castle shot from his chair like a bullet from a gun, "Hey! Beckett, wait up!"