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The Best Episodes of Castle Season 8

Every episode of Castle Season 8 ranked from best to worst. Discover the Best Episodes of Castle Season 8!

Binge this in 16h 6m•Peaking at 8.5/10

After a serial killer imitates the plots of his novels, successful mystery novelist Richard "Rick" Castle receives permission from the Mayor of New York City to tag along with an NYPD homicide investigation team for

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Episode Rankings

  1. #1 Fan Favorite
    Castle Season 8 Episode 1 - XY (1)
    8.1/10(1518 votes)

    #1 - XY (1)

    S8:E1

    After passing the Captain's exam last season, Beckett was surprised with an offer to run for State Senate. In the action packed season premiere, Castle and Beckett are adjusting to Beckett's career change, when a call from a mysterious stranger sets off an explosive chain of events. There are two sides to every story, and this unique two-parter will explore the same story from each of their perspectives, first from Castle's side as he searches for Beckett.

    Director:Rob Bowman
    Writers:Alexi Hawley, Terence Paul Winter

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  2. Castle Season 8 Episode 2 - XX (2)
    7.1/10(1401 votes)

    #2 - XX (2)

    S8:E2

    Beckett's side of her abrupt disappearance is revealed. After receiving a mysterious tip from her past, Beckett is launched into a fight for her life, with a team of mercenaries hot on her trail. While Castle investigates why his wife is on the run, Beckett must figure out who wants her dead, before they can finish the job.

    Director:Paul Holahan
    Writers:Alexi Hawley, Terence Paul Winter

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  3. Castle Season 8 Episode 3 - PhDead
    7.3/10(1130 votes)

    #3 - PhDead

    S8:E3

    When the body of a local college fraternity student is found gruesomely murdered, Castle has to go undercover as a professor in order to gain access to the victim's world. However, he and Beckett soon discover that behind the fun and games of college are some darker secrets the university wants to keep hidden.

    Director:Rob Bowman
    Writer:Chad Gomez Creasey

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  4. Castle Season 8 Episode 4 - What Lies Beneath
    7.2/10(1038 votes)

    #4 - What Lies Beneath

    S8:E4

    When Castle's idol, a famously reclusive author, turns up dead, Castle is determined to solve his hero's murder. But as he and Beckett dig deeper, they discover that truth is stranger than fiction.

    Director:Larry Shaw
    Writer:Barry O'Brien

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  5. Castle Season 8 Episode 5 - The Nose
    8.1/10(1227 votes)

    #5 - The Nose

    S8:E5

    When a priceless work of art is stolen and its transporter murdered, Castle and Beckett must work with the key witness to track down the painting and sniff out the killer.

    Director:Steve Robin
    Writer:Nancy Kiu

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  6. Castle Season 8 Episode 6 - Cool Boys
    7.9/10(1124 votes)

    #6 - Cool Boys

    S8:E6

    Detective Slaughter returns to enlist Castle’s help in solving a high-stakes robbery case. But when a body is found linked to the crime, Slaughter becomes the number one suspect in the heist turned murder, while Castle has to determine whether he’s guilty or help to prove he’s innocent.

    Director:Paul Holahan
    Writer:Alexi Hawley

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  7. Castle Season 8 Episode 7 - The Last Seduction
    7.8/10(1028 votes)

    #7 - The Last Seduction

    S8:E7

    In order to hunt down the brutal murderer of a grifting seducer, Castle & Beckett must investigate New York’s elite. Meanwhile, Castle plans to surprise Beckett on their one-year wedding anniversary.

    Director:John Terlesky
    Writer:Rob Hanning

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  8. Castle Season 8 Episode 8 - Mr. & Mrs. Castle
    7.6/10(1024 votes)

    #8 - Mr. & Mrs. Castle

    S8:E8

    Castle and Beckett investigate the murder of a cruise ship entertainer, only to find themselves trapped at sea with the killer.

    Director:Jeff Bleckner
    Writer:Christine Roum

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  9. Castle Season 8 Episode 9 - Tone Death
    7.5/10(1035 votes)

    #9 - Tone Death

    S8:E9

    When a body is found in the theater of Martha’s latest show, Castle and Beckett’s investigation leads them into the unexpectedly dangerous world of competitive a capella.

    Director:Hanelle M. Culpepper
    Writer:Robert Bella

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  10. Castle Season 8 Episode 10 - Witness for the Prosecution
    8.0/10(1018 votes)

    #10 - Witness for the Prosecution

    S8:E10

    Castle finally gets his day in court when he takes the stand as the key witness to a murder from five months ago. But when new information suddenly arises, he and Beckett must race against the clock to prevent a miscarriage of justice.

    Director:Bill Roe
    Writer:Terence Paul Winter

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  11. Castle Season 8 Episode 11 - Dead Red
    8.0/10(1017 votes)

    #11 - Dead Red

    S8:E11

    When the son of a Russian diplomat turns up murdered, Beckett and Castle find themselves in a dangerous game of international crime and punishment, with Castle having to entertain a jovial Russian security officer who winds up more involved than anyone planned.

    Director:Jeannot Szwarc
    Writer:Jim Adler

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  12. Castle Season 8 Episode 12 - The Blame Game
    8.5/10(1108 votes)

    #12 - The Blame Game

    S8:E12

    Castle is captured and forced to work with strangers to solve deranged puzzles and mind games, while Beckett and the 12th Precinct must race against time to rescue Castle and catch a killer.

    Director:Jessica Yu
    Writer:Michal Zebede

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  13. Castle Season 8 Episode 13 - And Justice for All
    7.5/10(950 votes)

    #13 - And Justice for All

    S8:E13

    Beckett and the 12th Precinct look into the murder of an English as a Second Language student. But when the victim's class won't talk to the police, Castle goes undercover as a French Canadian immigrant and learns that the victim was more than he seemed.

    Director:Kate Woods
    Writer:Adam Frost

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  14. Castle Season 8 Episode 14 - The G.D.S.
    7.8/10(1008 votes)

    #14 - The G.D.S.

    S8:E14

    Castle returns to the City of Angels in search of answers about his missing time. But things take a deadly turn when he’s recruited by the legendary Greatest Detective Society to help solve a murder.

    Director:John Terlesky
    Writer:Alexi Hawley

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  15. Castle Season 8 Episode 15 - Fidelis Ad Mortem
    7.7/10(957 votes)

    #15 - Fidelis Ad Mortem

    S8:E15

    When a recruit officer at the NYPD Academy is killed, Beckett and the team go back to their old training ground to investigate. Meanwhile, Castle must reckon with a decision with profound consequences for him and Beckett.

    Director:Rob Bowman
    Writer:Chad Gomez Creasey

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  16. Castle Season 8 Episode 16 - Heartbreaker
    8.0/10(963 votes)

    #16 - Heartbreaker

    S8:E16

    A clue at the scene of the death of an armored-car driver leads Beckett and Castle back to an old case solved by Esposito. But complications arise when they learn that Esposito might not have been telling them everything about his past with the culprit.

    Director:Thomas J. Wright
    Writer:Barry O'Brien

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  17. Castle Season 8 Episode 17 - Death Wish
    7.6/10(914 votes)

    #17 - Death Wish

    S8:E17

    The murder of a man connected to smuggling Turkish relics sends Castle, Beckett and the 12th Precinct on a search for a stolen antique believed to be Aladdin’s lamp, in hopes that it can lead them to the killer.

    Director:Bill Roe
    Writer:Stephanie Hicks

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  18. Castle Season 8 Episode 18 - Backstabber
    7.5/10(879 votes)

    #18 - Backstabber

    S8:E18

    After Hayley does a favor for an old friend, she finds herself implicated in a killing and cyber-terror attack. Now, Beckett and Castle must rush to solve the case and clear Hayley’s name.

    Director:Jessica Yu
    Writer:Robert Bella

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  19. Castle Season 8 Episode 19 - Dead Again
    8.0/10(992 votes)

    #19 - Dead Again

    S8:E19

    When a mild mannered safety inspector for the city miraculously survives a poisoning, it might be luck; but when he survives another, it’s a mystery Castle and Beckett will have to solve.

    Director:Bill Roe
    Writer:Rob Hanning

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  20. Castle Season 8 Episode 20 - Much Ado About Murder
    7.4/10(874 votes)

    #20 - Much Ado About Murder

    S8:E20

    After a movie star turned theater actor is mysteriously killed, Castle and Beckett go backstage and learn the star had more to worry about than just his lines.

    Director:Hanelle M. Culpepper
    Writer:Christine Roum

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  21. Castle Season 8 Episode 21 - Hell to Pay
    7.9/10(919 votes)

    #21 - Hell to Pay

    S8:E21

    When an axe-wielding, escaped psychiatric inmate drops dead in Castle’s P.I. office, Castle and Beckett’s investigation leads Castle to suspect the victim’s death could be the work of the Antichrist.

    Director:John Terlesky
    Writer:Unknown

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  22. Castle Season 8 Episode 22 - Crossfire
    6.9/10(1614 votes)

    #22 - Crossfire

    S8:E22

    With their best lead in hand, Castle and Beckett are ready to take on LokSat. But an unforeseen twist puts their case – and their lives – in jeopardy.

    Director:Rob Bowman
    Writers:Alexi Hawley, Terence Paul Winter

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Season 8 Ratings Summary

"XY (1)" is the best rated episode of "Castle" season 8. It scored 8.1/10 based on 1518 votes. Directed by Rob Bowman and written by Alexi Hawley, Terence Paul Winter, it aired on 9/21/2015. This episode is rated 1.0 points higher than the second-best, "XX (2)".