Eighth Season (Castle)

The eighth and final season of American crime-comedy-drama television series Castle was ordered on May 7, 2015, by ABC. The season premiered on September 21, 2015, in the United States on ABC, and the finale aired on May 16, 2016. The season consisted of 22 episodes.

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.

Premise
Richard Castle (Fillion) is a famous mystery novelist who has killed off the main character in his popular book series and has writer's block. He is brought in by the NYPD for questioning regarding a copy-cat murder based on one of his novels. He is intrigued by this new window into crime and murder, and uses his connection with the mayor to charm his way into shadowing Detective Kate Beckett (Katic). Castle decides to use Beckett as his muse for Nikki Heat, the main character of his next book series. Beckett, an avid reader of Castle's books, initially disapproves of having Castle shadow her work, but later warms up and recognizes Castle as a useful resource in her team's investigations.

Cast
Nathan Fillon as Richard Castle

Stana Katic as Captain Kate Beckett

Jon Huertas as Dt. Javier Esposito

Seamus Dever as Dt. Kevin Ryan

Tamala Jones as Dr. Lanie Parish

Molly C. Quinn as Alexis Castle

Susan Sullivan as Martha Rodgers

Toks Olagundoye as Hayley Shipton

Sunkrish Bala as Vikram Singh

Episodes

 * 1) XY (Sept. 21, 2015)
 * 2) XX (Sept. 28, 2015)
 * 3) PhDead (Oct. 5, 2015)
 * 4) What Lies Beneath (Oct. 12, 2015)
 * 5) The Nose (Oct. 19, 2015)
 * 6) Cool Boys (Nov. 9, 2015)
 * 7) The Last Seduction (Nov. 16, 2015)
 * 8) Mr. and Mrs. Castle (Nov. 23, 2015)
 * 9) Tone Death (Dec. 7, 2015)
 * 10) Witness for the Prosecution (Jan. 4, 2016)
 * 11) Dead Red (Jan. 11, 2016)
 * 12) The Blame Game (Jan. 25, 2016)
 * 13) And Justice For All (Feb. 1, 2016)
 * 14) G.D.S. (Feb. 15, 2016)
 * 15) Fidelis Ad Mortem (Feb. 29, 2016)
 * 16) Heartbreaker (Mar. 7, 2016)
 * 17) Death Wish (Mar. 28, 2016)
 * 18) Backstabber (Apr. 4, 2016)
 * 19) Dead Again (Apr. 25, 2016)
 * 20) Much Ado About Murder (May 2, 2016)
 * 21) Hell to Pay (May 9, 2016)
 * 22) Crossfire (May 16, 2016)

Media Release

 * Region 1: August 23, 2016
 * Region 2: November 14, 2016
 * Region 3: November 2, 2016