First and foremost let me preface my hypothesis by saying that it's been a fun ride watching the Red John chase from the very start and I hope the ending will not be unsatisfying.

The next three episodes are going to flow like a movie, and my theory for "Fire and Brimstone" is that Jane believes he has collected all his clues he needs to identify Red John, with the final Red Tattoo clue being the big discriminator. What Jane does not know however, which the audience does, is the whole Tyger Tyger situation.

From the promo Jane has got all 5 suspects in the room at gunpoint to finally get the moment he has been waiting for for the past 10 years-to catch Red John. What I believe will happen is that Jane, almost in a extremely simplistic way by his standards (albeit somewhat rational), will order them all to take off their tops to reveal which has The Red Tattoo thinking that whoever does must be Red John. However, the twist that I am predicting is that MOST of the 5 will have that tattoo if not ALL of them. With the tattoo relating to the Tyger Tyger organization in some way. This will initially stump Jane, but be his first insight into finding out about the vast secret organization leading into the 7th episode (The Great Red Dragon), and delaying what he thinks will happen in "First and Brimstone" but will actually occur in the 8th episode, which is the reveal of Red John.

These 3 episodes are the climax of 6 years of storytelling. It's gonna be good. :)

A few other points:

Many believe that Red John is not any of the 5 or even initial 7. I personally believe Bruno on this matter, however anything could happen.

Something more important for me just as much as who Red John is, is a thorough explanation of EVERYTHING that has transpired during the Red John storyline, I.e the He Is Ma clue, how and why do his disciples do what they do. After 6 seasons, the Red John storyline needs to conclude not only entertainingly, but with good clarity into all the clues and red herrings, not only in these S6 episodes, but the whole series. I think the fans that have stuck by deserve that at the least, and laziness in the final chapter would be a shame.

The theories will be coming thick and fast now!

How the hell did that lady see RJ's tattoo. Was he semi Naked *wolf whistles*. Honestly who goes to kill someone in the nip lmao!

I don't get the bugging. RJ has friends in high places. It makes no sense. Also couldn't Haffner give him the info too if he is a member of visualise. I'm very confused about the two groups

There will be a twist, hell next week PJ has them all together but the "RJ" episode is 2 more shows away?!? It won't take 3 hrs of tv to find one tattoo! Either they will all have one as part of the tiger-tiger group or nobody will have one. My guess would be they all do, thus transitioning into the new post RJ story line of tiger-tiger police corruption. Maybe RJ blows then all up to boot?!? It's never cut and dry with this show, lots more surprises to see!! Ones that prob make sense not un-dead characters or characters that showed up outta the blue!! All this list has been good for is moving the story forward and keeping the GVP theories at bay!!

I think all the "clues" and "hints" are simply diversions and deceptions
from the writer to keep the audience thinking and off track about Red
John's identity. There are so many, and quite frankly many plausible and
realistic theories about Red John's identity.
Bruno Heller is a great writer who plays with our minds, week in week out with his writing and his interviews about season 6.

Heller and the writing staff gave every suspect his moments for and against being Red John.
But
someone already said it. The chase has been on for so long... the
reveal of Red John has to be mindblowing, or else many viewers will be
hugely disappointed. I therefore think, that will not be as simple as it
being is one of the individuals on the list.
It has to be someone else entirely (Kirkland's Twin, Ardiles, Mashburn, someone Jane knows from his past) or at least two of the suspects on the list.

And
I still strongly believe that Grace is Red Johns main accomplice. I always
have the feeling, that when Van Pelt gets any information about Jane
being close to catching Red John someone important to the case dies,
just like the tracking.

The last thing, is regarding RJ's tattoo.
Is it really three dots on his shoulder or another deception? I mean,
the PI says he has a tattoo on his left arm and touches her left arm.
The three dots are the result of her fingertips being bloody. So are the
three dots just a coincidence? I mean where would she have seen a
tattoo on the shoulder (not to be seen unless, the person wears a
sleeveless), would RJ be so careless to reveal sth so important, or was
it a tattoo on his forearm (which is much more visible and revealable).

Since I do not believe that RJ is any of the people from the list, I thought I would share one of the people that I strongly suspect.

Alex Jane

Does anyone else suspect Patrick Jane's father, Alex, to be Red John?

He would be one of the only people to really know Patrick and his past. Plus, he is the one who taught Patrick how to be a con artist and a mentalist, so he would know all of his tricks, causing RJ and Patrick to think and be alike.

- He was said to be abusive and wicked
- He had no remorse (forcing Patrick to trick the sick girl at the carnival)
- Him & RJ have both been called 'showmen'
- Him & Patrick had a falling out - From there, Patrick ran off with his wife, and maybe that lead Alex to kill Patrick's wife and child (since that sort of murder is pretty personal).

I think Red John could be a woman because:

John Doe = unidentified man
Jane Doe = unidentified woman

(Patrick) Jane = man
so...
(Red) John = could be a woman

I don't think that these character names were just randomly chosen.

Micheal Kirkland is RJ
As so in the scene in the hospital who killed that guy was michael not Bob ,that is why he killed him without take the informotion of who was RJ and in the episode that kirkand menaces Lisbon about Volker was micheal not bob that talked with her and jane
and in the crime scene of Lorelains death was michael again not bob who talks with Jane