Prompt from emzy-caskett on Tumblr, "Can someone please write a fic where Castle dresses up in his 'Space Cowboy' outfit - because Beckett asks him to!?"

As you wish :)

Insert disclaimer of non-ownership of Castle and Firefly here.

"Please?"

She was giving him those puppydog eyes again. And he was doing so well at resisting too. That is, as well as could be expected in the circumstances.

"But Kaaaate..."

"Come on, Castle, you love wearing that costume, what's the big deal? Wear it for me."

It was time to break out the big guns.

He pouted.

"No! No pouting at me!" Beckett surpressed her giggle.

Castle rolled his eyes with a sigh. "Alright then. Just this once." He stomped out of the study in the direction of the closet. When he was out of sight and just about out of earshot, Kate let the giggle out and grinned excitedly.

"Do I have to put the gloves on too?" he called from the bedroom.

"Just tuck them in your belt, you've already got fingerprints all over me-.." The rustling from the next room stopped suddenly. "Uh, I mean.. all over this place." She heard him snort. "Hurry up in there!"

"Gorammit, Kate, I'm going as fast as I can, okay? This thing has more buttons and laces to tie than I remember." She indulged him by not replying, letting him concentrate.

"You ready out there?"

"Yes!" He didn't need to see her, her grin was all over her voice.

Stepping out from the bedroom, Castle strode into view. Kate gave him an appraising look.

"Well hello, Captain Tightpants."

His shoulders slumped and he rolled his eyes. "Look, I know, it doesn't fit as well as it used to, but I'm not as slim as I used to be!"

Kate gave him a mischievous smirk, rising from where she'd been leaning against the bookshelf by the door, and slinked towards him with a glint in her eye. "That's not what I was referring to..." She flicked her gaze downwards playfully, returning her look to his shocked face.

"Katherine Beckett, I never!"

"Is that a gun in your holster, or are you just pleased to see me...?"