I'm almost ashamed to admit I actually liked the episode. I expected the worst after the season finale, but this was a nice surprise.
The first half felt hectic and kind of rushed which I think kept me from feeling for Kate (that coffee scene did nothing for me and I think, viewers were supposed to be heartbroken when she almost started crying at the Precinct, but it left me cold), but I was really proud of Ryan for believing so strongly in Castle, even when his partner didn't. As far as Espo is concerned, I think he's a hot-headed guy who doesn't really think but immediately jumps to action. It's no excuse of course, but I think, deep down, he didn't really believe Castle would do this to his daughter and Kate. I also thought the second half of the episode was very strong. I think it hasn't sunk in yet with Castle, which is why he seemed pretty unfazed; Kate had been without answers/clues for two months by that time so it was easy for her to be desperate and angry. I think it will sicker in with Castle soon enough - I actually thought it started during that last scene, which is why it worked for me.
All in all, it wasn't my favorite episode but I think it could have been a lot worse. I liked the continuity with Vinnie The Scar and I think Tropical Storm was a big hint which doesn't make any sense yet, and what I've seen from the Promo for 7x02, they aren't done yet with the emotional repercussion and I'm kind of excited to see what struggles it will bring. And I'm intrigued to know what happened to Castle.
Castle's sun burn was a really nice touch; for some reason I really loved that, lol.