This episode kept me interested the whole time! It was one of the best episodes ever!
I particularily liked how the unsub was the same as an arsonist, without actually being an arsonist. It was a quite interesting twist in the profile. I like the fact that the unsub didn't care who he killed, it's not a good thing in real life, but it was quite nice to see an unsub who had no regrets and that could have killed a father just as easily as a child. It makes him stand out a little bit.
I hope the next episode is just as good as this one, although I don't think I have ever seen a bad episode on this show, so even if it's not as good as this one, it will still be good.