Re: Castle: Season 3 (Nathan Fillion, Stana Katic) - Discussion & Spoi
Was the line directly from Firefly or just a reference to said show?
It doesn't appear in the Pinyinary site of translations from the show, movie, and comics.
The reference is simply to the fact that Nathan Fillion used to star in a show where Mandarin was frequently spoken.
-- Christopher L. Bennett's blog and webpage