Castle moves from a sci-fi convention to a musical documentary next Monday, as the beloved ABC series tracks the death of a guitarist.

Once Castle and Beckett get involved, the crew that had been following around the victim end up turning their cameras on this romantic duo, as teased in the official network promo for "Swan Song."

Now we're here with a photographic preview of what's on tap. Click through the following pictures now and be on the lookout for guest star C. Thomas Howell...

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