Mondays 10:00 PM on ABC
Looking to watch Castle Season 3 Episode 21 online? TV Fanatic is your destination for every paid and free streaming option of the Castle S3E21 full episode from 2 affiliates.

Rating: 4.8 / 5.0 (98 Votes)

Episode Details

Castle Season 3 Episode 21: "The Dead Pool"

When a champion swimmer is found dead in a training pool, Castle & Beckett dive in to investigate his murder, and uncover myriad secrets.

Castle Season 3 Episode 21 Quotes

This looks like my first apartment, I used to have cockroach races.


This is why Alexis is never going to college.


Castle Season 3 Episode 21 Music

  Song Artist
Uncle-lucius-liquor-store Liquor Store Uncle Lucius iTunes
Make-the-girl-dance-baby-baby-baby Baby Baby Baby Make the Girl Dance iTunes
x Close Ad