Finally we get back to Red John. I can see this being spun out for another season or so, if they feed us the story in bits and pieces. The loyalty of Jane's team was funny and endearing, as was the reaction of their boss. I'd like to see more character development of the other characters but as long as the show is clever and amusing I'll tune in. The fact that Red John can seemingly tap into the same databases as the CBI team might make for some nice paranoia and make him nearly impossible to catch. And he seems to be as smart as Jane while being much more ruthless so identifying the killer might only be the start; proving it could take even longer.
The cryptic message left in addition to Red John's signature smiley is enigmatic. Was it left by the victim (almost certainly with Red John's knowledge) or did Red John leave it? "He is Mar" or "He is Man", it's unclear if this is intended as the first part of Red John's name or something else and I assume we'll soon know.