Interestingly, unlike other ABC releases, Castle's bonus features are spread across each disc in the set, rather than packing them all onto one disc. This certainly makes sense for the audio commentaries, which are provided for a few of the more memorable episodes. It's also convenient for the deleted scenes, too, keeping them near the episode that they belong with. Those are all pretty standard, nothing shocking or exciting to set Castle's apart from any other show. Though it is fun to see Castle bumble in front of Beckett's father (Scott Paulin). You can skip watching them, and won't miss anything. The longer features are all on the final disc, so the setup works pretty well.
One three and a half minute feature examines how the twelve murder boards on set are used to film each episode, as told by Kurt DeFilipps, the man in charge of doing so. A just over two minute music video called "Get On the Floor" comes from an episode during the season, expanded with scenes from the show added in. The obligatory four minute blooper reel begins semi-seriously, giving it a fun, unique spin. It also exposes the cast's potty mouths.
"Castle Goes Hollywood" is an eight minute short about filming in Los Angeles for one episode. Actually, Castle always films in L.A., but the cast and crew talk about how they had to adapt, since usually they are concerned with making L.A. pass for New York, and this time, they can embrace the city where they live.
Finally, "Murder They Wrote" is a twenty-two minute roundtable discussion with series creator Andrew Marlowe, executive producer Rob Bowman, author Michael Connelly, graphic novelist Brian Michael Bendis, and star Nathan Fillion. The guys discuss the writing process and the realism of the show. They also go into detail about the books and graphic novel that have been released in conjunction with the series. Fillion talks about his experience on Firely, always a treat. Plus, they remember Stephen J. Cannell, author and former guest star.