Rick Castle is coming to Community, folks.

Nathan Fillion has been cast on an episode of the NBC sitcom, Deadline confirms. The Castle star will guest star on a Season 5 episode when Jonathan Banks' Professor Hickey teams up with Annie to navigate the mysterious corridors of Greendale.

Look for Fillion to come on board as the school's head custodian, described by network insiders as "politically savvy" and unafraid "to get his hands dirty." While still wearing rubber gloves, of course.

Fillion is a huge supporter of Community and has stopped by the show's set, even posting a photo with the cast to WhoSay last year and including with it the caption: “It’s my #community dream come true!”

The same is now being said by fans across the TV landscape.

Matt Richenthal is the Editor in Chief of TV Fanatic. Follow him on Twitter and on Google+.