Castle ( TV series ) - Wikipedia Castle ( TV series ) Castle Genre Police procedural Crime Comedy - drama Created by Andrew W. Marlowe Starring Nathan Fillion Stana Katic Susan Sullivan Molly Quinn Jon Huertas Tamala Jones Seamus Dever Ruben Santiago - Hudson Penny Johnson Jerald Toks Olagundoye Composer ( s ) Robert Duncan Kim Planert Country of origin United States Original language ( s ) English No. of seasons 8 No. of episodes 173 ( list of episodes ) Production Executive producer ( s ) Andrew W. Marlowe Rob Bowman Armyan Bernstein Laurie Zaks Barry Schindel René Echevarria David Amann David Grae Rob Hanning Terri Edda Miller Terence Paul Winter Alexi Hawley Camera setup Multi-camera Running time 43 minutes Production company ( s ) ABC Studios Beacon Pictures Experimental Pictures The Barry Schindel Company Milmar Pictures Distributor Disney -- ABC Domestic Television Release Original network ABC Picture format 480i ( SDTV ) 720p, HDTV 1080i Original release March 9, 2009 ( 2009 - 03 - 09 ) -- May 16, 2016 ( 2016 - 05 - 16 ) External links Website beta.abc.go.com/shows/castle Castle is an American crime - comedy - drama television series, which 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. Created by Andrew W. Marlowe, it primarily traces the lives of Richard Castle ( Nathan Fillion ), a best - selling mystery novelist, and Kate Beckett ( Stana Katic ), a homicide detective, as they solve various unusual crimes in New York City. Detective Beckett is initially infuriated at the thought of working with a writer and goes to great lengths to keep him out of her way. However, the two soon start developing feelings for each other. The overarching plot of the series focused on the romance between the two lead characters and their ongoing investigation of the murder of Beckett 's mother. On May 12, 2016, it was announced that despite some cast members signing one - year contracts for a potential ninth season, the show was canceled. Contents 1 Premise 2 Cast and characters 2.1 Main 2.2 Recurring 3 Broadcast history 4 Reception 4.1 U.S. Nielsen ratings 4.2 Awards and nominations 5 Other media 5.1 DVD releases 5.2 Syndication 5.3 Tie - in works 5.4 Derrick Storm television series 6 References 7 External links Premise Richard Castle ( Fillion ) is a famous mystery novelist. Bored and suffering from writer 's block, he kills off the main character in his successful book series. He is brought in by the New York Police Department for questioning regarding a copy - cat murder based on one of his novels. He is intrigued by Kate Beckett ( Katic ), the detective assigned to the case. Castle decides to use Beckett as his muse for Nikki Heat, the main character of his next book series and uses his friendship with the mayor to force the police to let him shadow Beckett. Castle 's exuberant man child personality clashes with Beckett 's more reserved and professional demeanor, but the two eventually become friends and then lovers. Their cases often deal with murders occurring within various unusual subcultures or milieus, including reality TV shows, vampire enthusiasts, a science fiction convention, and a man who claims to be a time traveler. A recurring plot line deals with the unsolved murder of Beckett 's mother years before, an investigation which leads to an increasingly sprawling, and dangerous, conspiracy. Cast and characters Main article : List of Castle characters Main Nathan Fillion as Richard Castle, born Richard Alexander Rodgers, a best - selling mystery writer, who shadows and assists the NYPD. Castle is the only son of an actress Martha Rodgers and a man known as Jackson Hunt, and also the father of Alexis Castle. He is the partner of Detective Kate Beckett. Castle 's unusual theories sometimes irritate his coworkers, but often help solve the case. Richard has a complicated relationship with Detective Beckett. He lives with his mother and daughter. Stana Katic as Katherine `` Kate '' Beckett, an NYPD homicide detective. Beckett is a daughter of Jim and Johanna Beckett. She was raised in Manhattan. She was inspired to be a detective, because of her mother 's murder. She works with fellow detectives Javier Esposito and Kevin Ryan, and medical examiner Lanie Parish, who is her best friend. In the beginning Beckett 's relationship with Castle was strained, but after a while Kate and Richard start to understand each other. Jon Huertas as Detective Javier `` Javi '' Esposito, a former Army Special Forces soldier who now works in the homicide division as part of Beckett 's team. Seamus Dever as Detective Kevin Ryan, a former narcotics detective who works as part of Beckett 's team. He is best friends with Detective Esposito. Tamala Jones as Dr. Lanie Parish, a medical examiner and a friend of Beckett and on - again - off - again love interest for Esposito. Ruben Santiago - Hudson as Captain Roy Montgomery ( seasons 1 -- 3 ), Beckett 's boss and captain of the 12th Precinct. Molly Quinn as Alexis Castle, Castle 's daughter by his first wife, Meredith. Susan Sullivan as Martha Rodgers, Castle 's mother, an actress on and off Broadway. Penny Johnson Jerald as Captain Victoria Gates ( seasons 4 -- 7 ), Captain Montgomery 's replacement, formerly with Internal Affairs. Toks Olagundoye as Hayley Shipton ( season 8 ), a quick - witted, free - spirited former MPS cop and MI6 operative who now works as a security specialist. Recurring Maya Stojan as Tory Ellis, an NYPD Tech officer who assists on Beckett 's cases Arye Gross as Dr. Sidney Perlmutter, a medical examiner who assists on some of Beckett 's cases and does little to hide his dislike of Castle Juliana Dever as Jenny Ryan ( née O'Malley ), Ryan 's wife. In the sixth season, she gives birth to their daughter Sara Grace. In the eighth season, she gives birth to their son, Nicholas Javier. Michael Trucco as Detective Tom Demming, a handsome robbery detective with whom Beckett briefly becomes involved Monet Mazur as Gina Cowell, Castle 's publisher and second wife Victor Webster as Dr. Josh Davidson, Beckett 's motorcycle - riding, cardiac - surgeon ex-boyfriend to whom Castle repeatedly refers as `` motorcycle boy '' and `` doctor motorcycle boy '' Ken Baumann as Ashley, Alexis ' steady boyfriend Scott Paulin as Jim Beckett, Kate Beckett 's father Jonathan Adams as Vulcan Simmons, a ruthless Manhattan drug lord Bailey Chase as Will Sorenson, an FBI agent and Beckett 's ex-boyfriend who wants to reconcile but immediately recognizes Beckett 's attraction to Castle Michael Dorn as Dr. Carter Burke, a psychiatrist who helps Beckett overcome her shooting and also deal with her various hidden emotions Geoff Pierson as Mr. Smith, a friend of Captain Montgomery 's, who holds evidence that keeps the murderer of Beckett 's mother away from her Darby Stanchfield as Meredith, an actress who was Castle 's first wife and Alexis 's mother. She is regularly portrayed as self - centered and dramatic. Michael Mosley as Jerry Tyson / the Triple Killer ( 3XK ), a methodical and meticulous serial killer who returns to New York every few years to terrorize the city. He was believed to be dead, but has supposedly `` resurrected '' numerous times. Jack Coleman as William Bracken, a popular and charismatic senator representing the State of New York with ambitions of one day becoming president Phil LaMarr as Dr. Holloway, a psychiatrist who evaluates the mental stability of suspects Myko Olivier as Pi, Alexis 's boyfriend ( at the beginning of season six ) with whom she shares an apartment for a while Lisa Edelstein as Agent Rachel McCord, Beckett 's partner during her brief time working for the Attorney - General 's Office Annie Wersching as Dr Kelly Nieman, a respected plastic surgeon with a secret life as Jerry Tyson 's partner in crime Matt Letscher as ' Henry Jenkins ' ( real name unknown ), an impostor purportedly with the CIA who is involved with Castle 's disappearance Sunkrish Bala as Vikram Singh ( season 8 ), a high - strung tech analyst with the Attorney General 's office in Washington, D.C., where Beckett briefly works. He now works as a computer analyst for the NYPD. Kristoffer Polaha as Caleb Brown, an idealistic public defender found to have links to the LokSat conspiracy. Real - life writers Stephen J. Cannell, James Patterson, Dennis Lehane, and Michael Connelly appear as themselves during periodic games of poker at Castle 's apartment. Typically, they discuss Castle and Beckett 's current case and tease Castle about his involvement with Beckett. Following Cannell 's death on September 30, 2010, an empty chair was kept at the poker table for a year in his honor. Broadcast history Main article : List of Castle episodes 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. On May 10, 2012, Castle was renewed for a fifth season by ABC, which started on Monday September 24, 2012. Two additional episodes were ordered on October 19, 2012, and February 5, 2013, respectively, which brought season 5 up to a total of 24 episodes. On May 10, 2013, ABC announced via Twitter that Castle had been renewed for a sixth season. On May 8, 2014, ABC renewed the series for a seventh season, which premiered on September 29, 2014. On May 7, 2015, the series was renewed for its eighth season, which premiered on September 21, 2015. On April 18, 2016, ABC and ABC Productions announced that Stana Katic and Tamala Jones would not return for Castle 's ninth season, should it be renewed. Despite several other cast members having signed on for a ninth season, on May 12, 2016, it was announced that the show would be cancelled instead ; the final episode aired on May 16, 2016. Series overview Season Episodes Originally aired First aired Last aired 10 March 9, 2009 ( 2009 - 03 - 09 ) May 11, 2009 ( 2009 - 05 - 11 ) 24 September 21, 2009 ( 2009 - 09 - 21 ) May 17, 2010 ( 2010 - 05 - 17 ) 24 September 20, 2010 ( 2010 - 09 - 20 ) May 16, 2011 ( 2011 - 05 - 16 ) 23 September 19, 2011 ( 2011 - 09 - 19 ) May 7, 2012 ( 2012 - 05 - 07 ) 5 24 September 24, 2012 ( 2012 - 09 - 24 ) May 13, 2013 ( 2013 - 05 - 13 ) 6 23 September 23, 2013 ( 2013 - 09 - 23 ) May 12, 2014 ( 2014 - 05 - 12 ) 7 23 September 29, 2014 ( 2014 - 09 - 29 ) May 11, 2015 ( 2015 - 05 - 11 ) 8 22 September 21, 2015 ( 2015 - 09 - 21 ) May 16, 2016 ( 2016 - 05 - 16 ) Reception U.S. Nielsen ratings Season Timeslot ( ET ) Episodes First aired Last aired TV season Rank Avg. viewers ( millions ) Date Viewers ( millions ) Date Viewers ( millions ) Monday 10 : 00 pm 10 March 9, 2009 ( 2009 - 03 - 09 ) 10.76 May 11, 2009 ( 2009 - 05 - 11 ) 9.96 2008 -- 09 41 10.19 24 September 21, 2009 ( 2009 - 09 - 21 ) 9.26 May 17, 2010 ( 2010 - 05 - 17 ) 10.07 2009 -- 10 30 10.25 24 September 20, 2010 ( 2010 - 09 - 20 ) 10.70 May 16, 2011 ( 2011 - 05 - 16 ) 12.93 2010 -- 11 30 11.44 23 September 19, 2011 ( 2011 - 09 - 19 ) 13.28 May 7, 2012 ( 2012 - 05 - 07 ) 12.36 2011 -- 12 22 12.18 5 24 September 24, 2012 ( 2012 - 09 - 24 ) 10.45 May 13, 2013 ( 2013 - 05 - 13 ) 11.16 2012 -- 13 19 12.26 6 23 September 23, 2013 ( 2013 - 09 - 23 ) 11.48 May 12, 2014 ( 2014 - 05 - 12 ) 10.59 2013 -- 14 13 12.63 7 23 September 29, 2014 ( 2014 - 09 - 29 ) 10.75 May 11, 2015 ( 2015 - 05 - 11 ) 8.44 2014 -- 15 37 10.69 8 22 September 21, 2015 ( 2015 - 09 - 21 ) 6.84 May 16, 2016 ( 2016 - 05 - 16 ) 7.65 2015 -- 16 44 9.10 Awards and nominations Year Association Nominee ( s ) / episode Result Ref. 2009 Emmy Awards Outstanding Music Composition for a Series Castle / `` Flowers For Your Grave '' Nominated Satellite Awards Best Actor in a Series, Drama Nathan Fillion Nominated Best Actress in a Series, Drama Stana Katic Nominated Emmy Awards Outstanding Hairstyling for a Single Camera Series Castle / `` Vampire Weekend '' Nominated Outstanding Makeup for a Single Camera Series Nominated Outstanding Prosthetic Makeup for a Series, Miniseries, Movie or a Special Nominated Golden Reel Awards Best Sound Editing -- Short Form Music in Television Castle / `` Famous Last Words '' Nominated Best Sound Editing -- Television Episodic Amber Funk ( music editor ) Nominated Shorty Awards Entertainment CastleTV Nominated Entertainment WriteRCastle Nominated Celebrity Nathan Fillion Won 2011 TV Guide Magazine 's Fan Favorites Awards Favorite Couple Who Should Nathan Fillion and Stana Katic Won Favorite Drama Series Castle Won Shorty Awards Best Actor Nathan Fillion Nominated Writer Richard Castle Nominated Best Actress Stana Katic Won 2012 People 's Choice Awards Favorite TV Crime Drama Castle Won Favorite TV Drama Actor Nathan Fillion Won PRISM Awards Performance in a Drama Episode Stana Katic and Jon Huertas Won Drama Series Episode -- Mental Health Castle / `` Kill Shot '' Won TV Guide Magazine 's Fan Favorites Awards Favorite Couple Nathan Fillion and Stana Katic Won Shorty Awards TV Show Castle Nominated Best Actress Stana Katic Nominated Best Actor Nathan Fillion Won Fashion Luke Reichle Won ALMA Awards Favorite TV Actor Supporting Role in a Drama Jon Huertas Won 2013 People 's Choice Awards Favorite TV Crime Drama Castle Won Favorite TV Drama Actor Nathan Fillion Won Favorite TV Drama Actress Stana Katic Nominated Golden Reel Award Best Sound Editing -- Short Form Music in Television Castle / `` The Blue Butterfly '' Nominated TV Guide Magazine 's Fan Favorites Awards Favorite Couple Nathan Fillion and Stana Katic Won Imagen Awards Best Primetime Television Program Castle Won Best Actor Jon Huertas Won 2014 People 's Choice Awards Favorite TV Crime Drama Castle Won Favorite TV Drama Actress Stana Katic Won Favorite TV Bromance Kevin Ryan and Javier Esposito Nominated Favorite On - Screen Chemistry Richard Castle and Kate Beckett Nominated TV Guide Magazine 's Fan Favorites Awards Favorite actor Nathan Fillion Won Favorite actress Stana Katic Won 2015 People 's Choice Awards Favorite TV Crime Drama Castle Won Favorite Crime Drama TV Actor Nathan Fillion Won Favorite Crime Drama TV Actress Stana Katic Won Favorite TV Duo Nathan Fillion and Stana Katic Nominated Imagen Awards Best Primetime Television Program -- Drama Castle Nominated Teen Choice Awards Choice TV Show : Drama Castle Nominated Choice TV Actor : Drama Nathan Fillion Nominated 2016 People 's Choice Awards Favorite TV Crime Drama Castle Nominated Favorite Crime Drama TV Actor Nathan Fillion Won Favorite Crime Drama TV Actress Stana Katic Won Other Media DVD releases DVD Name Release Dates Episodes Discs Additional information Region 1 Region 2 Region 4 Season 1 September 22, 2009 May 6, 2010 ( German ) November 21, 2011 ( UK ) March 10, 2010 10 Misdemeanors : Bloopers & Outtakes, Whodunit : The Genesis of Castle, Castle 's Godfather, exclusive audio commentaries and Write - Along with Nathan Fillion Season 2 September 21, 2010 March 24, 2011 ( German ) April 16, 2012 ( UK ) December 1, 2010 24 5 ABC Starter Kit, On Set with Seamus and Jon, On Location with Nathan, Manhattan 's Most Unusual Murders, Misdemeanors : Bloopers & Outtakes, deleted scenes and music videos Season 3 September 20, 2011 November 24, 2011 ( France ) August 6, 2012 ( UK ) October 12, 2011 24 5 Deleted Scenes and Bloopers, Murder They Wrote, Castle Goes Hollywood, Murder Board 101, Cast and Crew Commentary, Music Video -- `` Get on the Floor '' Season 4 September 11, 2012 December 5, 2012 ( German ) March 25, 2013 ( UK ) November 14, 2012 23 5 `` Nathan & Friends : Castle Goes Radio '', `` Anatomy of a Stunt '', Audio commentaries, deleted scenes, and bloopers. Season 5 September 10, 2013 November 11, 2013 November 6, 2013 24 5 Deleted Scene : Are We Dating ?, Martha 's Master Class, Lot Cops, Your Home is Your Castle, Gag reel. Season 6 September 16, 2014 November 17, 2014 November 12, 2014 23 5 Character Commentary ( Need to Know episode ) with Detectives Javier Esposito and Kevin Ryan, Castle Karaoke, Castle in a Day with Stana Katic, A Few of Our Favorite Things ( including debut an unaired Castle and Kate moment from the season 4 finale ), Audio commentaries, deleted scenes, and bloopers. Season 7 September 1, 2015 November 16, 2015 November 11, 2015 23 5 Cast and crew commentary ( Driven episode ), Cast and crew commentary ( Reckoning episode ), Raging Heat Webmercial, Definition of Love music video, The Cast Behind The Cast featurette, deleted scenes, and bloopers. Season 8 August 23, 2016 November 14, 2016 November 2, 2016 22 5 Cast commentary ( Cool Boys episode ), Cast and crew commentary ( Heartbreaker episode ), The Great Escape featurette based on The Blame Game episode, deleted scenes, and bloopers. Syndication In June 2011, TNT acquired exclusive cable rights from Disney - ABC Domestic Television to air the first two seasons of Castle beginning in the summer of 2012. In advance of the series ' fourth season, TNT broadcast an eight - hour marathon of episodes on September 15, 2011, including five from season 3. Castle began airing on TNT every Wednesday beginning September 26, 2012. Castle also began airing in broadcast syndication on weekends beginning September 29, 2012. Tie - in works See also : Richard Castle § Literature 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. Naked Heat, the sequel to Heat Wave, was released on September 28, 2010. Naked Heat debuted at No. 7 on The New York Times Best Seller list. As they did with Heat Wave, ABC released a series of the early chapters online as a promotional tool. A third novel, titled Heat Rises, was released on September 20, 2011. It debuted at No. 1 on The New York Times Best Seller list on October 9, 2011 and at No. 5 on the USA TODAY Best - Selling Books list. The season three finale introduced a graphic novel based on Castle 's previous novel character, Derrick Storm. Castle : Richard Castle 's Deadly Storm was published by Marvel Comics on September 28, 2011. It debuted at No. 3 on The New York Times Best Seller list on October 16, 2011. This has been followed by three more graphic novels, published a year apart. A fourth novel, titled Frozen Heat, was released on September 11, 2012, and debuted on The New York Times Best Seller list at No. 7 on September 23, 2012. The fifth Nikki Heat novel Deadly Heat was released September 17, 2013 and debuted at No. 8 on The New York Times Best Seller list. Raging Heat, the sixth novel, was released on September 16, 2014. It landed on No. 6 on The New York Times Hardcover Fiction Best Seller list and on No. 17 on New York Times Combined Print and E-Book Fiction bestseller list on October 5, 2014. The seventh novel, Driving Heat, was released on September 15, 2015. It debuted on The New York Times Hardcover Fiction Best Seller list at No. 13 on October 4, 2015. On May 20, 2016, it was announced that two more novels would be published in the Nikki Heat series, even though the show itself had been canceled. The eighth book in the series, High Heat, was published on October 25, 2016. The ninth, Heat Storm, was released in May 2017. In February 2012, Hyperion announced three e-book novellas as part of Richard Castle 's famous Derrick Storm series. The first novella of the series, A Brewing Storm, was released in digital media on May 1, 2012. It debuted at No. 13 on The New York Times E-Book Fiction Best Seller list, as well as No. 18 on The New York Times Combine Prints & E-book Fiction list on May 20, 2012. On July 3, 2012, the second novella of the new Derrick Storm books, A Raging Storm, was released in e-book format. It landed on The New York Times Best Seller e-books list at # 19 and at No. 31 for the combined Prints & E-book list, both on July 22, 2012. The final Derrick Storm novella, A Bloody Storm, was released on August 7, 2012. It debuted on The New York Times Best Seller e-books list at # 20 and at # 34 on the combined Prints & E-book list on August 26, 2012. Derrick Storm television series On August 20, 2014, ABC announced that the early development stage has begun on a television series centered on Derrick Storm. The series will be a CIA procedural written by Gregory Poirier, who will executive - produce with Castle 's Andrew Marlowe and Terri Miller. 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Jump up ^ `` Castle -- Staffel 4 ''. Jump up ^ `` Castle - Season 4 ( DVD ) ''. Amazon.co.uk. Retrieved April 30, 2013. Jump up ^ `` Castle -- The Complete 4th Season ''. EzyDVD. Retrieved August 16, 2012. Jump up ^ Lambert, David ( May 10, 2013 ). `` Castle - Nathan Fillion and Stana Katic are Scheduled Now for ' The Complete 5th Season ' ''. TVShowsOnDVD. Retrieved May 11, 2013. Jump up ^ `` Castle - Season 5 ( DVD ) ''. Amazon.co.uk. Retrieved July 5, 2013. Jump up ^ `` Castle -- The Complete 5th Season ''. EzyDVD. Retrieved June 3, 2015. Jump up ^ Lambert, David ( June 6, 2014 ). `` Castle - ' The Complete 6th Season ' Press Release : Date, Extras, Packaging ''. TVShowsOnDVD. Retrieved June 10, 2014. Jump up ^ `` Castle - Season 6 ( DVD ) ''. Amazon.co.uk. Retrieved June 13, 2014. Jump up ^ `` Castle -- The Complete 6th Season ''. EzyDVD. Retrieved June 3, 2015. Jump up ^ `` Finally, Pre-Order Castle Season 7 on DVD ''. Castletv.net. Retrieved 16 October 2015. Jump up ^ `` Castle - Season 7 ( DVD ) ''. Amazon.co.uk. Retrieved 16 October 2015. Jump up ^ `` Castle : Season 7 ( DVD ) ''. ezydvd.com.au. Retrieved 16 October 2015. Jump up ^ Labert, David ( May 13, 2016 ). `` Castle - The 8th ( and Now Final ! ) Season Gets an Official DVD Date ''. Retrieved May 14, 2016. Jump up ^ `` Castle - The Complete Eighth Season ( DVD ) ''. Jump up ^ `` Castle - Season 8 DVD ) ''. Jump up ^ `` TNT Acquires Hit Crime Drama `` Castle '' ``. The Futon Critic. June 8, 2011. Jump up ^ Gorman, Bill ( September 12, 2011 ). `` TNT to Present Marathon of ' Castle ' Episodes as Hit Crime - Drama Gears Up to Launch Fourth Season on ABC ''. TV by the Numbers. Jump up ^ `` TNT Fall 2012 Schedule With Castle ; Season 4 of Hot in Cleveland Begins Nov. 28 on TV Land With Special Guests Regis, Locklear, and More ''. SitcomsOnline.com. August 14, 2012. Retrieved April 30, 2013. Jump up ^ `` NATPE 2012 : Day 3 - Fall 2012 Syndication ; Nick at Nite Orders Telenovela Adaptation ''. SitcomsOnline.com. January 25, 2012. Retrieved April 30, 2013. Jump up ^ Hibberd, James ( June 30, 2009 ). `` ' Castle ' book to promote series ''. The Hollywood Reporter. Retrieved January 6, 2010. Jump up ^ `` Heat Wave - Richard Castle Books ''. ABC. Retrieved December 2, 2009. Jump up ^ `` Best Sellers : Hardcover Fiction ''. The New York Times. October 9, 2009. Retrieved December 2, 2009. Jump up ^ `` Best Sellers : Hardcover Fiction ''. The New York Times. October 30, 2009. Retrieved December 2, 2009. Jump up ^ `` Best Sellers : Paperback Mass - Market Fiction ''. The New York Times. August 15, 2010. Retrieved August 16, 2012. Jump up ^ `` Best Sellers : Combined Print & E-Book Fiction ''. The New York Times. May 27, 2012. Retrieved August 16, 2012. Jump up ^ Ausiello, Michael ( March 17, 2010 ). `` ' Castle ' scoop : Romance for Castle and Beckett ? ''. Inside TV. EW.com. Retrieved May 24, 2010. Jump up ^ `` Best Sellers : Hardcover Fiction ''. The New York Times. October 17, 2011. Retrieved August 16, 2012. Jump up ^ `` NAKED HEAT by Richard Castle ''. ABC. Retrieved August 16, 2012. Jump up ^ `` Castle Exclusive : ABC Launches RichardCastle.Net ''. TVGuide.com. April 11, 2011. Retrieved 2012 - 04 - 08. Jump up ^ `` Best Sellers : Combined Print & E-Book Fiction ''. The New York Times. October 9, 2011. Retrieved August 16, 2012. Jump up ^ Zamarripa, Shauna ( October 20, 2011 ). `` ' Castle ' : Heat Rises is New York Times Best Seller ''. Yahoo ! TV. Archived from the original on July 10, 2012. Retrieved 2012 - 04 - 08. Jump up ^ Donahue, Deirdre ( September 29, 2011 ). `` ' Heat Rises ' for Richard Castle 's third thriller ''. USA Today. Book Buzz. Retrieved August 16, 2012. Jump up ^ `` Castle television show gets graphic novel treatment '' ( Press release ). Major Spoilers for Marvel Comics. May 16, 2011. Retrieved 2012 - 04 - 08. Jump up ^ `` Best Sellers : Hardcover Graphic Books ''. The New York Times. October 12, 2011. Retrieved August 16, 2012. Jump up ^ `` Frozen Heat ( Nikki Heat, Book 4 ) ( 9781401324445 ) : Richard Castle : Books ''. Amazon.com. January 2, 2011. Retrieved 2012 - 04 - 08. Jump up ^ `` Best Sellers - Combined Print & E-book Fiction ''. The New York Times. September 30, 2012. Retrieved April 30, 2013. Jump up ^ `` Best Sellers - Combined Print & E-book Fiction ''. The New York Times. October 6, 2013. Retrieved October 10, 2013. Jump up ^ Best Sellers - The New York Times Jump up ^ Best Sellers - The New York Times Jump up ^ `` Richard Castle 's Driving Heat : Read an exclusive excerpt - EW.com ''. Entertainment Weekly 's EW.com. Jump up ^ `` Release Date for Nikki Heat Book # 7 ''. castletv.net. Jump up ^ `` Best Sellers -- Hardcover Fiction ''. www.nytimes.com. Retrieved 16 October 2015. Jump up ^ `` ' Castle ' Book Series Lives On ( Read an Excerpt and See The Cover Now ) ''. The Hollywood Reporter. Retrieved 2016 - 06 - 18. Jump up ^ `` Best Sellers : E-Book Fiction ''. The New York Times. May 20, 2012. Retrieved August 16, 2012. Jump up ^ `` Best Sellers : Combined Print & E-Book Fiction ''. The New York Times. May 20, 2012. Retrieved August 16, 2012. Jump up ^ `` Best Sellers : E-Book Fiction ''. The New York Times. July 22, 2012. Retrieved August 16, 2012. Jump up ^ `` Best Sellers : Combined Print & E-Book Fiction ''. The New York Times. July 22, 2012. Retrieved August 16, 2012. Jump up ^ `` Best Sellers - E-book Fiction ''. The New York Times. May 5, 2013. Retrieved April 30, 2013. Jump up ^ `` Best Sellers - Combined Print & E-book Fiction ''. The New York Times. August 26, 2012. Retrieved April 30, 2013. Jump up ^ Abrams, Natalie ( August 20, 2014 ). `` ABC developing drama based on Derrick Storm novels from ' Castle ' ''. Entertainment Weekly. Retrieved June 16, 2016. 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Question: how many seasons of castle will there be
Answer: eight