I loved the foreshadowing there...Reid worring that case would not end well and being proved right. I knew that Hightower was going to end up killing Mason - I could see that one coming from about second or third act. I didn't see the brother getting killed by the Canadian cops.

And I loved Hotch's monologue at the end. (The bit about how there is not always a quote gave me a bit of giggle).

First impression on the last few seconds, Oh My God...Hotch.

Brain kicks in... Something is wrong here. This UNSUB doesn't kill like that. Hotch did not look scared... My guess, the shoot was a warning shot - and this is only the start of what he is going to put Hotch through. Like maybe using Jack and Haley in some sort of sick game.(Even if they aren't married anymore, he still cares for her. And whatever else, she is Jack's mother).