Castle
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.
Ratings
Based on audience scoresWhere to stream Castle
Streaming now in the United States on Amazon Prime Video, Hulu, Philo, and The Roku Channel.
Rent or buy in the United States on Amazon Video, Apple TV Store, Google Play Movies, and Fandango At Home.
Trailer
Castle season 1 trailer
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Frequently asked questions about Castle
Where can I watch Castle in the United States?
Castle is available to stream on Amazon Prime Video, Hulu, Philo, and The Roku Channel in the United States, and to rent or buy on Amazon Video, Apple TV Store, Google Play Movies, and Fandango At Home. Streaming availability is provided by JustWatch and can change over time.
Is Castle on Amazon Prime Video?
Yes. Castle is streaming on Amazon Prime Video in the United States, alongside Hulu, Philo, and The Roku Channel.
Can I watch Castle for free?
Castle streams free with ads in the United States on The Roku Channel. A subscription is not required, though the service may ask you to register.
What are the ratings for Castle?
Castle scores 8.0 on The Movie Database.
Who stars in Castle?
Castle stars Nathan Fillion, Stana Katic, Molly C. Quinn, Jon Huertas, and Seamus Dever. Andrew W. Marlowe is the creator.
How many seasons of Castle are there?
Castle has 8 seasons and 173 episodes, and is canceled.
What network is Castle on?
Castle airs on ABC, and is produced by Beacon Pictures, Experimental Pictures, and ABC Studios.
Ratings and streaming availability are aggregated from third-party sources; metadata from The Movie Database (TMDB), streaming data from JustWatch. This product uses the TMDB API but is not endorsed or certified by TMDB. Streaming availability checked September 2026.