I am THRILLED we actually KNOW who did it. THRILLED THRILLED THRILLED. In 42 moments took what was this never ending weight of a conspiracy and POOF... made it go away. I am glad we are where we are with the case. It's tangible. It has an END (to be determined at a later date.)
I was getting really tired of this conspiracy.
AND, I'm very curious how they will handle Castle and Beckett's relationship.
All in all, it felt good.