Castle is an American crime mystery/comedy-drama television series that aired on ABC for a total of eight seasons from March 9, 2009, to May 16, 2016. The series was produced jointly by Beacon Pictures and ABC Studios.
Castle premiered as a midseason replacement on ABC on March 9, 2009. ABC renewed Castle for a second season with an initial order of 13 episodes (later extended to 24 episodes). The second season premiered on Monday, September 21, 2009. In March 2010, ABC renewed Castle for a third, 22-episode season, which began on September 20, 2010. On November 11, 2010, ABC extended the episode order to 24. On January 10, 2011, ABC announced Castle had been renewed for a fourth season for 22 episodes. Season four premiered on September 19, 2011. On December 8, 2011, ABC ordered an additional episode bringing season 4 up to 23 episodes.
In the series, Castle writes a novel titled Heat Wave. As a tie-in, ABC and sister publisher Hyperion Books released that novel as a real book with "Richard Castle" as the author. It is entirely in character, from the dedication to the acknowledgments, although the latter mentions the principal cast and the show's creators by first name. ABC released the first half of the novel in weekly increments on their website. The complete novel was published in September 2009 as a hardcover, debuting at No. 26 on The New York Times Best Seller list. In its fourth week on the list, Heat Wave broke into the top 10 at No. 6. Heat Wave was released in paperback on July 27, 2010, and debuted at No. 34 on The New York Times Best Seller Paperback Mass-Market list. It once again appeared on The New York Times Best Seller list on May 27, 2012, at No. 19.
In season 3 "Nikki Heat", Castle is upset when B-movie actress Natalie Rhodes is cast as Nikki, thinking she is not right for the role. When Rhodes comes onto a case to observe Beckett, Castle is further insulted that she has not read the actual book. Rhodes considers him unimportant to the film and Beckett likes having Natalie around. However, as the case goes on, Rhodes begins to copy Beckett's mannerisms and outfits, complete with brunette wig, annoying Beckett while Castle begins to like her more. At one point, Rhodes kisses Castle, making it clear she wants to sleep with him to feel the character more but Castle turns her down, telling Beckett that sleeping with the actress playing the fictional version of her is "way too meta". 2b1af7f3a8