Castle (2009)

Kernel Score: 88% · 2,041 ratings

Genres: Drama, Crime

First aired: 2009-03-09

Seasons: 8 · 173 episodes

Where to watch Castle

US availability, updated 2026-10-22.

Overview

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 research purposes.

Castle parents' guide: ages 12+

Parents need to know that Castle is a TV-14 crime drama following a novelist assisting NYPD homicide investigations.

  • Violence & scariness: Some — Homicide investigations are central, though handled with a lighter tone per reviews.
  • Sex, romance & nudity: A little — Lead character has a romantic history described as having 'rotating women,' implying mild innuendo.

Fresh Kernels AI-assessed from the official TV-14 rating, publicly documented content. A guide for families, not an official rating.

Shows like Castle

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Cast

  • Nathan Fillion as Richard Castle
  • Stana Katic as Kate Beckett
  • Molly C. Quinn as Alexis Castle
  • Jon Huertas as Javier Esposito
  • Seamus Dever as Kevin Ryan
  • Susan Sullivan as Martha Rodgers
  • Tamala Jones as Lanie Parish
  • Toks Olagundoye as Hayley Shipton

Castle FAQ

Is Castle good?

Castle has an 88% Kernel Score on Fresh Kernels from 2,041 audience ratings.

Where can I watch Castle?

In the US you can stream Castle on Prime Video, Hulu and Philo, watch it free with ads on The Roku Channel and buy it from Prime Video, Apple TV, Google Play and Fandango At Home.

Is Castle OK for kids?

Castle is rated TV-14. Fresh Kernels suggests ages 12+. Parents need to know that Castle is a TV-14 crime drama following a novelist assisting NYPD homicide investigations.

What shows are like Castle?

If you liked Castle, try Homicide: Life on the Street, The Mentalist, Cold Case and Rizzoli & Isles.