Not a theory, but still interesting. There's this Mentalist fanatic on Youtube; his name is Americ and he's part of a channel called HappyCool. He makes wonderful weekly reviews of The Mentalist, and he occasionally gets the privilege to see episodes prior to airtime. 

This is Americ's reaction to the Red John (Season 6 Episode 8) episode. There are no spoilers, only Americ's reactions coupled with some soothing music.

Definitely worth the watch, and if you can let me know what Americ reacts to at 1:38, I would love to know. Is it an RJ reveal, or is it a Jane-Lisbon moment?

Link: http://www.youtube.com/watch?v=vWYpReqi678&feature=c4-overview&list=UUamPGTREfS0YRJBkC7cBHPg 

Enjoy and continue theorizing. I love them.

What I'm wondering about is the gunshot at PJ's house. If you look at the layout of the house, where bertram and smith were sitting they had the main door to their left, which means looking at the front of the builiding from Lisbons perspective, they were behind the window left of the door.
That means that PJ shot someone on the couch as we can clearly see at the beginning of "the Great Red Dragon" the light beam from the gunshot could be seen in the left window from Lisbons perspective, the 3 Blake Association members were on the right side of the house. 
Am I wrong ? What could that mean ?

still not 100% sure its mcallister but jane and the three tyger tyger guys were on the same side of the room when it exploded just wondering how he died yet every one else on that side of the room survived

Just something I recognized a few minutes ago.. 

1. ) When you watch the (extended) Promo for S06x06 (The Red John Episode) - many have mentioned that the guy jumping through the glass looks a lot like McAllister. Could be. 

2.) Just re-watched the scene ( S06x03) where Patrick calls McAllister while being in the forest. 

-McAllister sounds ALOT like Red John on the phone ( listen to his voice saying "Sheriff McAllister... What can I do for you Patrick?") and compare that for example to the last phone call of Red John in the first Episode of Season 6 (at the End). 

AND: 

When it comes to the Promotion of the Red John Episode - the voice (which is Red John i presume) says "The game is over and I won!" - and McAllister (in the conversation mentioned above) says something like "Game is game, isn't it?" when they talk about hunting. 

Another clue? I don't know. Just thought it could be interesting for you guys as well :) 

Anyone think they wouldn't show McAllister (assuming it is him) in the promo?  Doesn't that kind of ruin the big reveal?

Check this out - Hands comparison between 3 captures:

http://postimg.org/image/wa6qhdrr3/

From left to right
1. From promo of Episode 8 of Season 06, Red John (Supposing it's really RJ in the scene with Jane)
2. From Episode 06,Season 06 - Sheriff at Jane's house
3. From Episode 13,Season 04 - Roy Tagliaferro holding a cup of tea at Rosalind's house

What do you think?

Stoped the promo, while watching it again, to do some stuff. When i returned it saw this. Damn you CBS :( 

Spoilers!
[IMG]http://i39.tinypic.com/6tcz6x.jpg[/IMG]