Season: 2
Air Date: 10/26/09

"Vampire Weekend" is another in a long line of fun, decidedly breezy mysteries in the reigning breezy crime procedural series Castle, in which the sexually charged banter between hot detective Kate Beckett (Stana Katic) and her "partner," mystery author Rick Castle (Nathan Fillion), is always more important than the actual case they're investigating.

"Weekend" features the duo delving into the sordid world of the underground vampire fetish community (in this day and age we're 100% sure such a community actually exists) to solve the murder of a man who was staked through the heart, but the real reason it's notable is the none-too-subtle wink at Fillion's previous leading man gig, when Rick dons a certain brown duster coat for a costume. All 500 Firefly fans across the country rejoiced.