Watch TV Castle Season 3 Episode 21 - 9movies

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Castle Season 3 Episode 21

Castle and Beckett must solve the murder of a champion swimmer who had a shot at the Olympics. They need to sort through all the secrets they uncover to find what led to his death. Meanwhile, Castle's poker buddies offer their views on the case.

Starring:

Jon Huertas, Nathan Fillion, Ruben Santiago-Hudson, Seamus Dever, Stana Katic, Susan Sullivan, Tamala Jones

Genre:

Comedy, Drama, Short

Show Trailer

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Safe/legal ways to watch Castle Season 03 Episode 21

Subscription platforms: Netflix, Disney+, Amazon Prime Video, Apple TV+, HBO Max/Max (region-dependent), Viu.
Ad‑supported legal services: Tubi, Pluto TV, Crackle, Peacock (where available).
Rent or buy: Google Play Movies, Apple iTunes, Amazon.
Library & public options: Kanopy, Hoopla (free with many library cards or universities).
Official YouTube channels: Some studios and distributors post full films legally.

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