Firefly's "Mal" Makes a Special Appearance on Castle

Yes, it's horribly self-referential and cute, but, as Nathan Fillion/Mal/Castle himself says, "I like it!"  Nice to see he still fits into the old suit.  Imagine William Shatner trying to do this five years after TOS went off the air.  (Nah he was too busy doing The Barbary Coast right about then.  OMG .. The Barbary Coast.  Don't make me remember, don't make me remember!!)