I was watching a recent episode of Castle (“Encounters of the Murderous Kind”) and found an awesome inside joke involving Nathan Fillion, the actor who plays Castle. It happens to be in Chinese (Mandarin)!
Nathan Fillion played the character Mal in a sci-fi show called Firefly (it’s no longer on TV, but there are episodes on Hulu). Firefly is set in the future and involves space travel. English and Chinese are the main languages of the world (well, galaxy). The characters on the show speak Chinese words here and there, especially when using insults. That’s where the inside joke comes from. That’s quite a bit of Chinese that Castle picked up while watching Firefly! =D