I loved the start, you kind of wonder is it Kate or Castle and it's Lanie and Javi. And I loved her little speech and his standing there taking a photo with such a straight face and then a smirk. Ah I love those two together. And I loved when Castle was talking about not sleeping with people you work with and Javi freaking out!
I actually really like the idea of this episode. It had interesting plots.
I strongly agree with Lenz though, the confession they got out of him was completely inadmissible in court! I bloody study forensics and criminology and crime sciences, all different fields, and all drill it into our heads what you can and can't say in court and what is and isn't admissible! And that most definitely is not. She may not be brought up on any form of charges, but that was not allowed. And I'm glad they don't employ those tactics EVERY episode, but other shows do and it's just horribly annoying, watching these people be brutal and how they act is not allowed. These people would just say "I felt scared and forced into giving a confession" and it'd be justified!
Rant over sorry guys.