Cop killer Hal Lockwood, whom Beckett visited unsuccessfully in jail for months hoping for a lead in her mother Johanna's closed murder case, is released by a faked order into the general ... See full summary »



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Episode cast overview, first billed only:
Chuck Ryker
Mike Yanavich
Dwight Haskell


Cop killer Hal Lockwood, whom Beckett visited unsuccessfully in jail for months hoping for a lead in her mother Johanna's closed murder case, is released by a faked order into the general population, where he slices rogue cop Gary McCallister's throat, then is helped by fake cops to escape. Beckett, his likely next target, receives warnings from her father, Montgomery and Castle. Much helped by Ryan and Esposito, the duo work out that there must be a police accomplice and/or mastermind controlling Chuck Ryker, the debt-ridden corrupt jailer who was found murdered at his home. Written by KGF Vissers

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TV-PG | See all certifications »

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Release Date:

16 May 2011 (USA)  »

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Aspect Ratio:

16:9 HD
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Did You Know?


When Captain Montgomery is giving Beckett his "make your stand" speech, he calls her the best cop he's ever trained. But in Castle: Under the Gun, it's mentioned she was trained by Mike Royce. See more »


Chuck Ryker: It's Ryker. I've got a visitor for Lockwood. Ad-Seg, 34617. Yeah. What do you mean? Lockwood's no longer in Administrative Segregation.
Kate Beckett: Where is he?
Chuck Ryker: He was transferred to general population about an hour ago.
Kate Beckett: What? He was in Ad-Seg for a reason. You've got to get him out of there now.
Chuck Ryker: Why? What's the big deal?
Kate Beckett: There is a prisoner in the general population, Gary McCallister. Lockwood is going to kill him the first chance he gets.
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References Castle: Knockdown (2011) See more »


Castle Theme
Written by Robert Duncan
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User Reviews

Excellent season finale
29 December 2015 | by (United Kingdom) – See all my reviews

I'm not as obsessed with this show as everyone else but wow they do the "big episodes" well. That's when they really deliver, that's why I keep watching.

I don't think I breathed during the opening ten minutes. Wow.

Sidenote: Does anyone think that the title credits music is totally inappropriate for episodes like this? It's kind of cheeky and cheerful and totally disrupts the mood. They should do what other shows do and get rid of the title sequence for episodes like this or just have a black screen with the name of the show at the bottom for a couple of seconds, minus the inappropriate music.

I'd actually forgotten a lot of the stuff to do with Beckett's Mum's murder so I'm glad we had that mini-summary courtesy of the whiteboard.

Gosh that Castle/Beckett moment in Beckett's apartment. I loved Castle there, loved him and it's very seldom that I feel that way about him.

OMG Captain Montgomery <3 <3 <3 <3 <3 His speech to Beckett!! I have a sense of FEAR AND FOREBODING. I'm going to be right about him being killed, right? Oooh when I heard that someone was going to die, I thought it was going to be him and I also thought there might be more than meets the eye. But still, WOW. This isn't quite as bad as the whole Zach storyline on Bones and way more believable but, you know, bold move writers, bold storytelling.

Ryan/Esposito!!! That scene outside of the bar is just ..... there are no words.

MONTGOMERY! Castle/Beckett! Okay, clearly Beckett is not dead but woah, I was NOT expecting that ending. I thought that the climax was the Montgomery thing. See the trouble with having an ending like this is that you know Beckett's not dead, you know who wanted her dead, you know that (probably) the next season it will open a few weeks into her recovery / her first day back at work after recovery. If they'd shot, I don't know, Esposito or Ryan then it would be more of a cliffhanger. Of course, the real cliffhanger could be "did Beckett hear Castle say 'I love you'?". My money is on she did but she will act like she didn't for as long as possible.

Can I just repeat how much I love Castle in this episode because I think it needs to be said, especially from me. Best episode ever? Yes, in terms of writing, how gripping it was and just, well, everything apart from the fact next season there will be no Captain Montgomery.

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