That was easily their best episode all season. No cheesy lines or coyness. It was written and played so realistically. As a consequence tho' I think next season could be the last which, if handled as well as this episode, would be fine with me.
Somehow, I don't remember how now, I got alerted that the ebook for Heat Wave was available for $0.99 on Amazon. I'm not a big ebook reader, but for that price it was worth it to try out. I started reading it on my iPhone when I'm at gym, and boy it's a great surrogate for Castle until Castle comes back in the fall! I'm about 2/3 done and it's fun and funny. If I finish this fairly soon, I might buy the next one too.