Find out if an ABC show such as "Castle" has been cancelled by visiting its page on the ABC website and checking for posts about a series finale or cancellation. Alternately, visit television show tracking sites such as RenewCancelTV, Zap2It, TVSeriesFinale and SpoilerTV and check for articles about its status.
ABC, like many other major networks, includes a detailed sections on its site dedicated to each of its programs, such as "Castle." This section contains pictures of the cast and crew, episode summaries and blog posts about the program among other items. If the show is cancelled, these sections are likely to include information about the end of the series and the reaction of fans and the cast to the news. You should also check the episode guide section of these sites to look for an episode marked as a series finale, as it indicates that there are to be no more episodes of the show.
Many websites also frequently publish articles containing the latest news about the renewal status of different shows. Some articles simply list different shows that are officially cancelled by a network, while others include a mix of cancelled and renewed shows. Certain high-profile shows, such as "Castle," also frequently receive exclusive articles about cancellation or renewal.