While watching the episode I found fresh quality with the dialogues, first as Castle open up to and confronted Beckett regarding their unspoken love affair, and then as Montgomery gave spoke wisely to Beckett about the nature of the job.
What threw me was how funny it looked as Castle literally "carried" Kate out of the hangar (which for some reason had no security guards whatsoever, as if choppers are a dime a dozen) and how clumsily the setup for that standoff was crafted. We can suspend our disbelief for the sake of the story but not for such circumstantial element that are actually supposed to strengthen the credibility of the plot.
And then... An active sniper nestled pretty close to where there are hundreds of cops. Come on, please.
So, even though I did appreciate how they wanted to handle the tone with this one, I didn't buy it. Sorry but certain scenes in this episode look like carictures of what they were intended to be.
When successfull series need to keep the tension for the main story, they unfortunately sail into such troubled waters. I had observed similar drops in quality with the very stretched Red John saga of The Mentalist.
I can't say I didn't enjoy them trying a harsher and darker tone for the sake of keeping thebigstory alive, but in addition to the nonsensical details I mentioned above, the resolution just does not add up.
What now, Montgomery had all the answers BUT did nothing about this as Beckett's and the force's time and resources were being wasted? The character was not constructed in a fashion to support such a background or an attitude.
I can imagine the reasons behind this episode is being rated so high but I think the script had as many holes as a Swiss cheese, turning the execution into acheesy kind of dark, which definitely wasn't the intention.