Castle (2009)

The BEST seasons of Castle (2009)

Every season of Castle (2009) ever, ranked from best to worst by thousands of votes from fans of the show. The best seasons of Castle (2009)!

Rick Castle is one of the world's most successful crime authors. But when his rock star lifestyle isn't enough, this bad boy goes looking for new trouble and finds it working with smart, beautiful Detective Kate Beckett. Inspired by her professional record and intrigued by her buttoned-up personality, Castle's found the model for his bold new character whether she likes it or not. Now with the mayor's permission, Castle is helping solve crime with his own twist.

Last Updated: 6/7/2022Network: ABC (US)
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Season 3
star
8.48
196 votes

#1 - Season 3

First Aired 9/21/2010

She’s still armed. He’s still dangerous. And their chemistry is hotter than ever. Season three finds both Richard Castle and Detective Kate Beckett pursuing romantic options of their own. Their signals may be crossed, but this duo hasn’t lost any of their spark. With Beckett’s intrepid police work and Castle’s uncanny insight, solving murder has never been so much fun.

Season 2
star
8.39
223 votes

#2 - Season 2

First Aired 9/22/2009

Best-selling mystery novelist Rick Castle’s unique approach to crime solving may have won over Detective Kate Beckett, but after crossing her, Castle is going to have to do his best work to get her back on his side.

Season 4
star
8.39
191 votes

#3 - Season 4

First Aired 9/20/2011

Prepare for a season full of suspense as Castle works to identify Beckett's shooter while Beckett struggles with the aftermath of her near-death encounter. All the while, the duo tackles a new batch of New Your City's most interesting cases.

Season 1
star
8.35
269 votes

#4 - Season 1

First Aired 3/10/2009

A murder-mystery writer and a detective team up to catch a serial killer who is reenacting murders from his books. Once the case is solved, the unlikely pair continue to work together to probe New York City's most unusual homicides.

Season 5
star
8.24
170 votes

#5 - Season 5

First Aired 9/25/2012

Now that Castle and Beckett have finally given in to their true feelings for each other, how will it affect their work together? As they try to keep their new relationship under wraps from their co-workers, the unlikely duo must track down the murderer of Beckett's mother, find the perpetrator of a major conspiracy and untangle a line of investigation that links Castle to a ritualistic killing.

Season 6
star
8.23
162 votes

#6 - Season 6

First Aired 9/24/2013

After Castle's stunning romantic proposal to Beckett, what happens next? The magnetic crime-fighting couple faces a whole new set of challenges as they juggle wedding plans and their most intriguing cases yet. Beckett's new job with the Justice Department takes her away from the wisecracking love of her life. But Castle's devotion to his new fiancee - and her fascinating line of work - jeopardizes her career and creates a chain of events that might separate them forever. Back on the home front, Castle is none too pleased to discover his daughter has seemingly been captivated by, and now living with, her new, free-spirited boyfriend.

Season 7
star
8.04
166 votes

#7 - Season 7

First Aired 9/30/2014

The wedding bells are ringing, but will Castle and Beckett really tie the knot? On the biggest day of his life, Castle is nowhere to be found, and it's not because he has cold feet. Now, in a season of brilliant twists and turns, Castle and Beckett take on New York City's most fascinating cases while they try to solve the mystery of their own relationship.

Season 8
star
7.38
159 votes

#8 - Season 8

First Aired 9/22/2015

In the Season 7 finale, Beckett was faced with a choice about her future. Now that she's been promoted to Captain, how will New York's famous couple adapt in Season 8?