One of our favorite things about following the Castle cast and crew on Twitter is becoming privy to a plethora of behind-the-scenes secrets. Last night, we learned a juicy wardrobe tidbit from Season 4, Episode 21: "Headhunters" thanks to Castle's trusty costume designer, Luke Riechle.

But first, let's set the stage: Rick Castle has just interrupted Ethan Slaughter's morgue visit to inquire about a possible ride-along with the infamous gang unit detective. Much to Castle's chagrin, the corrupt cop dismisses his request … unless, of course, he can get something out of the deal.

"That is a very fine coat," Slaughter points out (Firefly reference, anyone?). Without even batting an eyelash, Rick removes the coat and hands it over to its new owner. Slaughter seems pleased with the exchange, but doesn't hold up his end of the bargain. He waltzes out of the morgue, browncoat in tow, looking sharp in his spiffy new outerwear.

But wait just a minute. Isn't Adam Baldwin about three inches taller than Nathan Fillion? Unless this is Castle: Brotherhood of the Travelling Coat, how could Rick's jacket have fit the brawny detective so perfectly?

Turns out, there was more than one!

"We had made the jacket for Nathan months before but fortunately there were more skins available. Between stunts and sizes we had 4," the costume designer explained.

"We had to do a 'cowboy switch' when they traded off."

Nice work, Luke! We watched the scene back and you can't even tell. It's amazing what a little bit of creativity can do, isn't it?

Source: Twitter

Credit: YouTube Photo: Nathan Fillion and Adam Baldwin Flashback! Captain Mal Spares Jayne's Life in Firefly Episode 9: "Ariel"

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