Entertainment • TV Series

Castle

"Castle" is an American crime-comedy-drama television series created by Andrew W.

By Ethan Anderson| Reviewed by Olivia Bennett, Standards & Fact-Checking Lead| Updated July 26, 2026|2 min read| Fact-checked

"Castle" is an American crime-comedy-drama television series created by Andrew W. Marlowe that aired on ABC from 2009 to 2016. It follows mystery novelist Richard Castle and NYPD detective Kate Beckett as they solve murder cases in New York City while their relationship develops over time. The series also centers on the long-running mystery of Beckett’s mother’s murder.

Premise

"Castle" centers on Richard Castle, a mystery novelist who becomes involved with the NYPD after a copycat killer uses scenes from his books. He partners with Detective Kate Beckett to solve unusual murder cases, with the show mixing crime investigation, humour, and romance.

Cast and characters

The main cast includes Nathan Fillion as Richard Castle and Stana Katic as Kate Beckett, with Susan Sullivan in a supporting role. Their professional partnership and evolving personal relationship are central to the series.

Broadcast history

The series premiered on ABC on March 9, 2009 and concluded on May 16, 2016. It ran for 8 seasons and 173 episodes.

Story arcs

Alongside weekly cases, the show follows a larger mystery surrounding the murder of Beckett’s mother. That storyline becomes an important recurring thread and is eventually resolved in the series finale.

Key facts

Castle follows bestselling author Richard Castle and detective Kate Beckett as they investigate murders together in New York City.
The series combines procedural crime stories with ongoing character development and a central romance between the two leads.
A major serialized plotline involves the unsolved murder of Beckett’s mother, which runs through much of the series.
The show aired for eight seasons on ABC and ended in 2016.

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Canadian context

The series aired internationally and remains available through major streaming services in some regions, making it familiar to Canadian viewers who follow U.S. network crime dramas.

Frequently asked questions

What is Castle about?

It follows mystery novelist Richard Castle and NYPD detective Kate Beckett as they solve murders in New York City, while their partnership develops into a romance.

Who stars in Castle?

The series stars Nathan Fillion as Richard Castle and Stana Katic as Kate Beckett; Susan Sullivan is also among the main cast listed in major database entries.

How many seasons of Castle are there?

"Castle" has 8 seasons.

Is Castle based on a true story?

No source identifies it as based on a true story; it is a fictional television series created by Andrew W. Marlowe.

Who killed Beckett's mother in Castle?

The series reveals that Senator William Bracken was connected to the murder through a conspiracy, and the case is resolved in the final episode.

Where to watch Castle?

Availability varies by region and service, but listed streaming options include Disney+ and Hulu, with episodes also available to buy on some digital platforms.

References

Wikipedia — https://en.wikipedia.org/wiki/Castle_(TV_series)
Supports: Series premise, creator, setting, major plotlines, and run dates.
IMDb — https://www.imdb.com/title/tt1219024/
Supports: Main cast, premise, series dates, and genre information.
Wikipedia (French) — https://fr.wikipedia.org/wiki/Castle_(s%C3%A9rie_t%C3%A9l%C3%A9vis%C3%A9e)
Supports: Beckett’s mother murder arc and its resolution in the final episode.
TV Guide — https://www.tvguide.com/tvshows/castle/1030308536/
Supports: Where to watch, season count, and storyline details.
TVmaze — https://www.tvmaze.com/shows/68/castle/episodeguide
Supports: Pilot premise and relationship between Castle and Beckett.
IMDb — https://www.imdb.com/title/tt1219024/faq/
Supports: Season count and series premise.