Mondays 10:00 PM on ABC
Watch Castle Season 5 Episode 21 online via TV Fanatic with over 8 options to watch the Castle S5E21 full episode. Affiliates with free and paid streaming include Amazon, iTunes, Vudu, Google Play, Xfinity, Hulu Plus, Hulu, and ABC.

Rating: 4.1 / 5.0 (288 Votes)

Episode Details

Castle Season 5 Episode 21: "The Squab and the Quail"

Beckett is assigned to protect a billionaire on this episode of Castle, which prompts her to reflect on her relationship.

Castle Season 5 Episode 21 Quotes

Would you rather play with a kid in an imaginary world or me in a real world?


The things you notice when you're paying attention.