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149 free Castle (TV Series) trivia questions with answers — entertainment quiz, new questions added Aug 2026.
This Castle trivia quiz is about the ABC crime dramedy that ran for eight seasons and 173 episodes from 2009 to 2016, following best-selling mystery novelist Richard Castle and NYPD detective Kate Beckett. (Looking for medieval fortresses, moats and keeps instead? Try our castles quiz.) The easy questions cover the things any viewer knows: who plays Castle and Beckett, the name of the precinct, the daughter and the actress mother in the loft, and the fictional detective Nikki Heat. From there it works through the whole run: the copycat killings of the pilot, Beckett's mother's murder and the conspiracy behind it, the Triple Killer, Captain Montgomery's secret, the sniper at the funeral, Senator Bracken and the tape hidden in elephant figurines, the D.C. job, the missing two months, the Hamptons wedding, LokSat and the flash-forward finale. There are behind-the-scenes questions too, on the Firefly in-jokes, the real Nikki Heat and Derrick Storm books that hit the New York Times bestseller list, the writers' poker game, the show's Emmy nominations, and the Canadian roots of its two leads. Every answer was checked against the encyclopaedia entries for the series, its seasons, its characters and its cast before publishing, and the supporting sentence is stored with each question.
30 of 149 questions with answers and explanations. Play the quiz
Q 01Who plays mystery novelist Richard Castle?
Nathan Fillion
He first found fame as Joey Buchanan on a daytime soap opera.
Q 02Who plays Detective Kate Beckett?
Stana Katic
She later starred as FBI agent Emily Byrne in Absentia.
Q 03How many seasons of Castle were made?
8
Some cast members had signed one-year contracts for a ninth season before the cancellation.
Q 04How many episodes of Castle aired in total?
173
Season one had just 10 episodes; every later season had 22 to 24.
Q 05Who created Castle?
Andrew W. Marlowe
He also wrote a 1997 Harrison Ford action thriller set on a hijacked plane.
Q 06Where do Castle and Beckett solve crimes?
New York
Castle and Beckett work out of the NYPD's fictional 12th Precinct in New York City, though the series was filmed in Los Angeles.
Q 07Which long-running book character does Castle kill off at the start of the series?
Derrick Storm
Derrick Storm, hero of Castle's successful book series, is killed off out of boredom and writer's block; fellow writers Patterson and Cannell say he should have retired or crippled him instead.
Q 08Whose friendship does Castle use to get permission to shadow Beckett?
The mayor's
Castle is a friend of the mayor of New York, who lets him shadow Beckett as research for his Nikki Heat novels; Gates later keeps him on at the mayor's behest.
Q 09Who plays Alexis Castle?
Molly C. Quinn
Her character shares a 50-year-old scotch with her father after solving a case in season eight.
Q 10Which actress plays Castle's mother Martha?
Susan Sullivan
Her character opens the Martha Rodgers School of Acting after an inheritance.
Q 11Who plays Detective Esposito?
Jon Huertas
Jon Huertas plays Javier Esposito, a former Army Special Forces soldier turned NYPD homicide detective.
Q 12Who plays Detective Kevin Ryan?
Seamus Dever
His real-life wife Juliana plays Ryan's wife Jenny.
Q 13What is Kevin Ryan's police background before joining Beckett's team?
Narcotics detective
Kevin Ryan was a narcotics detective before joining Beckett's homicide team; that narcotics stint included going undercover inside the Irish mob.
Q 21What is Castle's second wife Gina Cowell's job?
His publisher
Gina Cowell is Castle's publisher at Black Pawn; she keeps the job after their divorce and spends the summer after season two at his Hamptons house supervising his second Nikki Heat book.
Q 22Which agency does Castle's father, Jackson Hunt, work for?
The CIA
Jackson Hunt is a veteran CIA operative; he first reveals himself when Alexis is kidnapped to Paris in the season-five two-parter "Target" and "Hunt".
Q 23Which actor plays Castle's father?
James Brolin
His character has secretly checked in on the family their whole lives.
Q 14What is Lanie Parish's job?
Medical examiner
Lanie Parish is a New York City medical examiner who performs the team's autopsies; she is also Beckett's best friend and Esposito's on-off girlfriend.
Q 15Who is Beckett's captain for the first three seasons?
Roy Montgomery
Roy Montgomery, played by Ruben Santiago-Hudson, is revealed as the third corrupt cop tied to Johanna Beckett's murder.
Q 16What nickname does Captain Victoria Gates go by?
Iron
Victoria Gates is nicknamed "Iron Gates" for her rigid, by-the-book command; she insists on being called "Sir" rather than "ma'am".
Q 17Which police division did Captain Gates come from?
Internal Affairs
Gates transferred to the 12th Precinct from Internal Affairs, which makes her far warier of a civilian like Castle than Montgomery ever was.
Q 18Hayley Shipton, added in season eight, formerly worked for which two organisations?
The Metropolitan Police and MI6
She is played by Toks Olagundoye and now works as a security specialist.
Q 19What is Castle's birth name?
Richard Alexander Rodgers
Castle was born Richard Alexander Rodgers and legally changed his name to Richard Edgar Castle, taking the middle name Edgar in honour of Edgar Allan Poe.
Q 20What is the name of Castle's first wife and Alexis's mother?
Meredith
Castle compares her to a deep-fried Twinkie: a treat occasionally, deadly every day.
Q 24What is Jerry Tyson better known as?
3XK, the Triple Killer
Jerry Tyson is the Triple Killer, 3XK: he strangles three women in a single week, then vanishes for years before striking again.
Q 25Which corrupt politician is ultimately behind the murder of Beckett's mother?
Senator William Bracken
He is arrested during a live TV interview announcing a presidential run.
Q 26What is Mr. Smith's role in the conspiracy storyline?
He holds files that keep the killer at bay
Montgomery sent him the files before his death.
Q 27Which Star Trek actor plays Beckett's psychiatrist Dr. Carver Burke?
Michael Dorn
Michael Dorn, Star Trek's Worf, plays Dr. Carver Burke, the therapist who helps Beckett through the trauma of her shooting in season four.
Q 28Which Simpsons voice actor plays Judge Markway, one of Castle's poker buddies?
Dan Castellaneta
Dan Castellaneta, the voice of Homer Simpson, plays Judge Markway, a poker buddy who frequently signs Beckett's warrants.
Q 29Who plays Agent Rachel McCord, Beckett's partner in Washington?
Lisa Edelstein
Lisa Edelstein, Dr. Cuddy on House, plays Agent Rachel McCord, Beckett's federal partner in Washington in the opening episodes of season six.
Q 30What is Dr. Kelly Nieman's profession?
Plastic surgeon
Her secret life is as Jerry Tyson's partner in crime.