150 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 150 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
Filming actually took place in Los Angeles.
Q 07Which long-running book character does Castle kill off at the start of the series?
Derrick Storm
His fellow writers Patterson and Cannell tell him he should have retired or crippled the character instead.
Q 08Whose friendship does Castle use to get permission to shadow Beckett?
The mayor's
Gates is later obliged by the mayor to keep him on as a consultant.
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
His character is a former Army Special Forces soldier.
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
He was also once undercover in the Irish mob.
Q 14What is Lanie Parish's job?
Q 21What is Castle's second wife Gina Cowell's job?
His publisher
She keeps the role after their divorce and spends a summer at his beach house supervising his second Nikki Heat book.
Q 22Which agency does Castle's father, Jackson Hunt, work for?
The CIA
He first appears when Alexis is kidnapped in season five.
Q 23Which actor plays Castle's father?
James Brolin
His character has secretly checked in on the family their whole lives.
Q 24What is Jerry Tyson better known as?
Medical examiner
She is Beckett's best friend and Esposito's on-off girlfriend.
Q 15Who is Beckett's captain for the first three seasons?
Roy Montgomery
He is revealed as the third corrupt cop tied to Johanna Beckett's murder.
Q 16What nickname does Captain Victoria Gates go by?
Iron
She insists on being called "Sir" rather than "ma'am" and takes a dim view of Castle.
Q 17Which police division did Captain Gates come from?
Internal Affairs
Her IA past makes her far warier of Castle than Montgomery 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
He took the pen-name 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.
3XK, the Triple Killer
He strangles three women in a week, then vanishes for years.
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
He helps her deal with the trauma of her shooting.
Q 28Which Simpsons voice actor plays Judge Markway, one of Castle's poker buddies?
Dan Castellaneta
His character frequently issues Beckett's warrants.
Q 29Who plays Agent Rachel McCord, Beckett's partner in Washington?
Lisa Edelstein
Beckett briefly works a federal job in season six.
Q 30What is Dr. Kelly Nieman's profession?
Plastic surgeon
Her secret life is as Jerry Tyson's partner in crime.