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The Best Seasons of 'Castle'

Updated July 24, 2020 1.3k votes 335 voters 12.6k views8 items

All seasons of Castle are entertaining, but which seasons really stand out? Novelist Richard Castle helps New York Police Detective Kate Beckett solve cases as their relationship grows. Some of the most memorable episodes of Castle come from different seasons, so picking the top season isn't easy. Some Castle seasons focus on catching killers, while other good seasons reveal Castle and Beckett's true feelings for each other. To determine once and for all what the best seasons of Castle are, let's rank every Castle season from best to worst.

Castle is a comedy-drama created by Andrew W. Marlowe starring Nathan Fillion as the titular mystery novelist Rick Castle who teams up with NYPD detective Kate Beckett (Stana Katic) to solve crimes - starting with a copycat killer who re-creates scenes from Castle's books. Castle premiered on ABC on March 9, 2009. After eight seasons, Castle aired is 173rd and final episode on May 16, 2016.

Vote up your favorite seasons of Castle, and vote down any seasons that you really didn't enjoy, despite how much you loved any individual episodes. Is your favorite season of Castle not as high as it should be? Be sure to vote it up so it rises to the top. It can be painful to put one Castle season over the other when there are so many good ones, which is why you can vote on however many seasons you like.

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  • Photo: ABC

    The fourth season of Castle premiered on September 19, 2011, and contains 23 episodes. This season finds Beckett recovering from her gunshot wounds.

    This season features several unforgettable episodes including: "Heroes & Villains," "Dial M for Mayor," and "Always."

    Memorable moments from Season 4 include:

    • Castle and Beckett investigate a murder in a haunted house.
    • Martha and Castle are held hostage.
    • Beckett and Castle kiss.
    186
    46
    Agree or disagree?
  • Photo: ABC

    The fifth season of Castle premiered on September 24, 2012, and contains 24 episodes. This season finds Beckett and Castle enjoying a romantic relationship.

    This season features several unforgettable episodes including: "After the Storm," "Secret Santa," and "Watershed."

    Memorable moments from Season 5 include:

    • Beckett returns to her job on the force.
    • Firefly references abound at a science fiction convention.
    • Castle proposes to Beckett.
    155
    30
    Agree or disagree?
  • Photo: ABC

    The third season of Castle premiered on September 20, 2010, and contains 24 episodes. This season finds Beckett struggling with the complicated relationships with the men in her life.

    This season features several unforgettable episodes including: "A Deadly Affair," "Almost Famous," and "Knockout."

    Memorable moments from Season 3 include:

    • Beckett arrests Castle.
    • Nikki Heat goes for a ride along.
    • Castle tells Beckett that he loves her after she is shot.
    151
    42
    Agree or disagree?
  • Photo: ABC

    The second season of Castle premiered on September 21, 2009, and contains 24 episodes. This season finds Castle becoming inspired by the work that he and Beckett do.

    This season features several unforgettable episodes including: "Deep in Death," "Tick, Tick, Tick..." and "A Deadly Game."

    Memorable moments from Season 2 include:

    • Heat Wave becomes the subject of a movie and a murderer's interest.
    • Castle and Demming compete for Beckett's attention.
    • A talk show host is found dead.
    126
    31
    Agree or disagree?