Fan-favorite Nathan Fillion (Firefly) will guest star on an upcoming episode of the NBC comedy series, Community.  The Castle star will feature in a fifth season episode that also guest stars another actor with a more recent cult following, one Jonathan Banks (Breaking Bad).  "When Annie (Alison Brie) and Professor Hickey (Banks) team up to navigate Greendale’s corridors of power, they must contend with Bob Waite (Fillion), the politically savvy head custodian who’s not afraid to get his hands dirty but is smart enough to wear rubber gloves."  There is no premiere date for season five of Community just yet, but we do know that star Donald Glover will only appear in five episodes. (Via Deadline)