Second fantastic ep in a row. :) I like CM best when we can see the team work... figuring things out based on the evidence and the clues, revising their profile as new evidence comes in, evaluating expressions and behavior and drawing conclusions. The show doesn't need fancy gimmicks (or long-lost twins)... there are still plenty of types of people, plenty of types of cases that they would reasonably take to keep it interesting each week.
And they even handed us a little extra: with the bit of backstory on Rossi, and, interestingly, there was an extremely subtle tie-in to Morgan's backstory. A long, long time ago, there was an episode where the unsub was a teen that had been severely bullied. Reid took it personally, and behaved unprofessionally in the field. Hotch asked Morgan to talk to him, and Morgan told Reid that he'd been bullied as well, that he used to be small, but worked out because he had to, in order to survive. Then, in this ep, as Rossi is telling the story of the kid and the locker... check out the look on Morgan's face.
Excellent ep, again. Keep up the good work, writers! :)
(Regarding the reviewer who marked it down for being "disturbing"... this is Criminal Minds. It's supposed to be disturbing. The entire premise is that it's about "trained manipulators" with the FBI (quoting a CM fanfic that gave a good description), who study criminal psychology, and use their knowledge of that psychology, in order to get confessions/find suspects/save lives. It's just as much about the psychology and the manipulation-for-a-good-cause, as it is about the crime, because that's what this show's all about. This is a good