I really was on the edge of my seat while watching - Castle was just so determined, and Tyson and Nieman make an awesome killer couple.
Stana - man, she's just great. The look in her eyes - determined, sure, "I will kill you!" - and Nieman looking so surprised and confused - just great acting from everyone in this episode.
I just can't get over it - if they'll address Kate needing therapy after this, or if it's just assumed she does. Castle might wanna join her for all I know.
A fanfic brought it to my attention - Kate stabbed Nieman. Well, supposedly. We don't know, after all, but she definitely cut her - it had to have reminded her of her mom. Kinda interesting.
Anyway, I'm just glad they're dead now.
This was one of the darkest episodes.
Oh, and the reunion - and Castle's back at the precinct, working on his 1,000 social hours
I loved how they brought him back, and Kate being insanely happy about it.