So,Brett Partridge is back in episode Red John...it is a good thing because either he is Red John which will satisfy a lot of people or (and more likely) it is a flashback where we will get our explanation why Red John killed him.

My opinion is that Red John is either Bertram or McAllister and both of them would be a good Red John. So we need to wait and see what will happen and trust Bruno Heller that he will do a good job. Cheers!