Check out the promotional photos and some spoilers for season 3 finale of Castle, titled "Knockout"! Finale (season 3 episode 24) airs on Monday, May 16. Castle has been renewed for season 4.
- Kate Beckett's investigation into her mother's death is reactivated when Hal Lockwood (guest star Max Martini, "The Unit") - a professional hitman with knowledge of Beckett's mother's murder - stages a spectacular escape during a court hearing. A
- s police launch a manhunt for Lockwood, Castle and the team uncover evidence of a deeper conspiracy involving a mysterious figure with law enforcement connections who is linked to both Lockwood's escape and the killing of Johanna Beckett.
- The search for Lockwood and the quest to identify his co-conspirator leads to a shocking and deadly conclusion.