As of 2015, ABC does post full episodes of "Castle" on its official ABC Go website, though only certain episodes are available to be watched in full. Older episodes and episodes from previous seasons can only be viewed through a brief recap video clip and summary.
Aside from full episodes, viewers can also read articles that are relevant to a particular episode. Video clips that depict moments in the episodes are also available. The show airs on Mondays on ABC at 10 p.m. or 9 p.m. Central time, as of March 2015. The main cast of the show includes Nathan Fillion as Richard Castle and Stana Katic as Kate Beckett.