http://www.whoisredjohn.com/See-a-theory-Red-John/12782

Good job. Just replace "Red John imposter" with "Gale Bertram" and that's Red John caught red-handed.

I'm sincerely hoping for a jaw dropping finale Sunday coming, but I can't shake the feeling Heller is trying to make TV history by being the first series to ever re-jump the proverbial shark for good measure.

(the first shark jump was when Red John came back from the "dead" after Jane killed Timothy Carter in the mall, IMO)

Now it looks like RJ is coming back from the "dead" again to try the jump one more time.

Will it be Bertram? The political bureaucrat who can't even play poker, suddenly turned cold, calculating killer who can outsmart Jane?  Hardly.

Partridge?  He's dead, despite them not showing his face in the last episode. Unless we assume Cho is totally incompetent and check his face off camera, after talking to Jane on the phone.

So who is Red John?

Rigby said the explosion in Jane's house was from military grade bomb and brought to the scene by RJ.

Cue Jaws theme for shark re-jump (da dum ... da dum ... da dum dum dum dum dum dum dum da dum dum dum dum dum dum dum ...)

Who was hunting deer in the previous episode with a military style rifle with night scope?

McAllister.

Who was supposedly burned to a crisp while separated WITH all the other survivors of the explosion (Bertram, Smith and Jane)?  

McAllister.

As for Haffner and Stiles?  Well if the Mentalist doesn't get canceled, they could always raise Red John from the dead in true Lost meets Mentalist style (i.e. Stiles) for a THIRD time by having Stiles and Haffner magically escape to Equador.

Afterall, there is talk that Jane will be fleeing to South America.

And Equador (where Stiles was going) is in South America ... just sayin'.

I'm still not sure about RJ's identity, nonetheless, I have a theory concerning him and TT. 

First, I do believe Bertram is the head (or one of the heads) of Blake Association. HOWEVER, I don't think he is working for RJ, I think he rather wants him eliminated because RJ is causing some trouble on the inside of the Association. My theory is, most of RJ's followers (Craig and Todd for example) were part of Blake Association at first, before they met RJ. Then, he turned them after finding a way for them to work for him. So basically, he "steels" Blake Association members and turns them so HE could be the one controlling them. It makes RJ part of the Association as well. 
The fact that RJ is taking control pisses Bertram off, which is why he's constantly asking Jane some heads up on the RJ case.  He wants him eliminated for good. Everytime he tells Jane "I want to be there where you finish this", you can actually feel that he means every word. He wants to see RJ die once and for all.

Why would RJ (if he is the Sheriff or Haffner) go to the church and ask for  PJ forgiveness? (I saw it in a spoiler video somewhere)
That's not the kind of thing a narcissistic psychopath like RJ would do in first place (ask for forgiveness ), and if he is not Bertram then he is not even on the hook..nobody is chasing the Sheriff or Haffner..

SPOILER

Bertram rings PJ and asks to meet him. I would suspect this is in the church. and Bertram gives him information which then leads to identifying RJ.  The RJ voice has been dubbed over in the actual preview and comes later.

Watch this.
Not the first part. (that's a 30s preview) Watch it then........

it is a 2nd part press play again  once it has stopped. it last 1m 23 seconds.. kinda tells you what is going on

 I actually thought I had stumbled into the whole episode for a second.

http://www.spoilertv.com/2013/11/the-mentalist-episode-608-red-john_18.html