Castle's on right now. Halloween episode.
Episode opens with Castle-putting-on-costume-montage.
Red shirt. Tight pants. Boots. Revolver. BROWN LONGCOAT.
Alexis: "What is that?"
Castle: "This? This is, a.... space cowboy."
Alexis: "Again? You wore that costume five years ago."
Castle: "...I like this costume..."
See, this is why we love Nathan Fillion. Also, there was a Buffy reference afterwards. It just makes sense.
Freakin' love this show . . .
EDIT: Found a sneak picture from the set:
Space cowboy indeed . . . . .