Even though it says Jack Plotnick (Brett Partridge) will appear in the episode 'Red John', I get the feeling that it may just be him featuring in a flashback/memory, not the present time.

I'm Probably wrong, but i just thought i would say :)

Guys, this will only take a second of your time. Go to the link below:
http://www.imdb.com/name/nm0687443/
The above link is to the IMDb page of Jack Plotnick (Brett Partridge.)

As you can see, it will display the episodes of The Mentalist he appears in. And it shows that Jack Plotnick will make an appearance in the episode 'Red John' as Brett Partridge. I am not saying that he is Red John, but I believe he will make an appearance.

Hello, I used 6 theories, which I altered (again), to provide a description of episode 4 and 6. It is once again, a piece of fun. Feel free to criticise if you don’t understand it fully. Plot accuracy is not 100%, but I tried my best. Enjoy/hate. Your show, your opinion!
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Part 6: Fire and Brimstone


What actually happens in Patrick's house?



You must read this opening to understand the sequence of events that take place.
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1. We know Bertram knows Kirkland. Agent Kirkland asks "Can we trust her?" about Lisbon to Bertram.

(a) If its Michael, he's asking "Is she holding out on info about Lorelei Martins?"
(b) If its Robert, he's asking "Is she part of the corrupt group in law-enforcement?"

It is most probably Robert. Because Kirkland says "You'd know better, you've worked with her." And Bertram says "Can we trust anyone?"

2. We know Bertram calls himself seemingly "duplicitous" right in front of Patrick. That's not something a suspect/Redjohn should be saying.

3. We know Bertram wants to be there, when they catch Red John.

This all points to Bertram being the Snape of The Mentalist. He's a triple agent. He's actually a good guy.

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There is 1 gunshot fired, then a large period of time later: a Bomb Blast.

Ok, so you know:

-Bertram is a triple agent - a good guy! 
-Bertram knows Kirkland
-Bertram knows McAllister
-Bertram knows Smith

Proof they are all good cops on the inside of the Tiger Tiger:-

1. Bruno Heller says Red John has bad intentions for some of those on the list.

2. Kirkland is not a retard. When he meets Smith for coffee, he is missing one cup, as he has just met with Bertram again. He does not randomly choose a low-level agent to confide the Tiger Tiger message to. Kirkland is questioning of Lisbon, the most honest cop there is. He sneaks up on Smith unsuspectingly to check out if he’s a good undercover cop. Noone told Smith that Kirkland knows he's undercover. Kirkland found out via Bertram over coffee. Kirkland and Smith get onto the same page. At the end, Smith kills Michael Kirkland , after Bob was switched out into freedom. . 

3. It is no co-incidence 3 suspects, meet the day after Partridge is "dead". Bertram is still keen for Patrick to tell them when he's close to catching Red John. They’re all actually good guys. McAllister saves Patrick’s life. Patrick even asks “When you said you’re at my disposal, did you really mean it?” Patrick who keeps his cards closest to his chest, has a hunch they’re good.

4. Patrick reassures them he knows they're being watched. "I've always suspected this room was bugged... wired." 

5. Ok, when those 3 reveal their tattoos, they have this look on their face: First, it looks like Hate. But they're saying "You’re smart, you KNOW we're undercover- you better not shoot me!"
Only McAllister says, "It's not what you think." McAllister is the only one who doesn't know Kirkland. But Bertram gives Patrick a knowing look. Earlier in his office, Bertram calls Kirkland. "I've just had a very interesting conversation with Patrick Jane." Kirkland will tell Bertram to trust him.

6. Patrick separates those 3 suspects. Then he shoots Ray Haffner. Ray Haffner is not Red John, but he is a murderer. He killed the copycats, Jared Renfrew and the prostitute, and he painted the smiley on Lisbon. Figures, why RJ’s MO seemingly changed during the series.  It is clear however, he did NOT kill Jane’s family.  Jane’s wife and daughter were slashed in real RJ style. 


Optional Explanation of Haffner being a murderer.
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7. Here comes the explanation : Ray Haffner is the Halloween Masked Man. 

Quote Brett Partridge: “[Redjohn]’s been laying low for years, working through friends and proxies.” 

-       When Halloween Masked Man saves PJ from the copycats, he shoots left-handed 
-       The way Ray Haffner walks, is the same as the Halloween masked man 
-       Halloween masked man paints Lisbon’s face taking care Brett Partridge uses the phone, while Haffner paints. 
-       Haffner is in Lisbon’s dream 
-       Halloween masked man pats Jane on the shoulder, the same way Haffner pats Cho after their talk
-       Ray Haffner looks like he was a football player, he won the “Heisman” trophy (Renfrew’s only clue) 
-       Surveillance expert- easily knows he was bugged + easily tracks down Jared Renfrew  

http://www.youtube.com/watch?v=MKZvmwU1ufg

Watch the video above. 

Haffner is moving like a robot. Because he’s actually waiting before Brett Partridge speaks, before he can carry out an action. He waits for the voice to act on 3 occasions: 

-       He walks to the copycats. Cue Pause for voice. Then slashy time. 
-       He walks to Patrick’s chair. Cue voice. Then lifts it up
-       He leans into Patrick’s face for like 3 seconds before spitting out the first word of the poem. 
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Why I think Red John didn't bomb Patrick's house:

Patrick looks at the Smiley in his room for one last time. Those scenes where he walks around the house are his last moments before it will become wreckage. He bombs his own house.

- Teresa arrives on cue for the explosion

While Teresa is speeding through the driving route, we see a larger car coming the opposite direction, stopping. People are leaving Jane's house. They warn Lisbon is on her way, calling Jane and making him speed up on the explosion front. Jane's shot and kidnapped  people. The explosion is necessary to get away with the crime, until he catches Red John anyway. Jane has to blame it on Red John.

The suspects are now in danger. Reede and Bertram are friends of  Kirkland, so they can get protection from Homeland security. Patrick decides it’s safer to fake McAllister's death. Stiles' death is also faked, meaning Patrick decides to kidnap him. They are probably taken to where Kirkland has been hanging out.

The same night that Jane gets information about Red John's whereabouts from Stiles, the SWAT team arrives at Red John's house. In an extra scene from the pilot, Jane describes it has a large citrus tree in the front yard.

Let’s face it. If the SWAT team is called, Red John will know. He will elude Jane but he won't have time to clear out his belongings though. When Jane walks around Red John's house, he will remember Red John from his past. He will see pictures of a young Red John. And flashback scenes will occur.

Next day, Jane will go public. Since Jane has Stiles, RJ's father, he is playing from a position of power.Almost Checkmate Jane.

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Happy watching!

In my mind there is no doubt that Partridge is RJ, What is kind of strange though is that IMDB has confirmed Plotnick for the red john episode. 

What I wonder about is how they are gonna solve the finale showdown between RJ and PJ. Throughout the show we've learned that Patrick is the smarts and brightest, and every episode ends with a twist made by himself. I can't see RJ deserving any less. Therefore I Think PJ has known RJs identity a while now, and is just playing him. I Don't know about you but i found that whole scene at his house last episode to be very theatrical, just like he's normal cons, especially with the handgun in the back pocket. For me it won't be enough that PJ drifts upon Partridge in the "pirlesque" park randomly and kills him, I want to know that PJ outsmarted him, and then humiliates RJ in the form of a long con.

My theory is that PJ has known RJs identity from the very beginning of the show, or from season 6ep2 when he saw the woman in the park. I do not think PJ will learn RJs identity in the last episode, would be so inconsistent with the rest of the show. If the spoiler interview is real, we know that RJ wants a relationship with patrick so much that he puts his life in jeopardy, I guess thats the reason he was sitting in the park to begin with, and i think that the bracelet was a mistake on his part. Think the last few minutes between RJ and PJ is going to be satisfying, and I actually think there will be a Sherlock moment (movies) where PJ tells about all the real clues he has picked up over the years, like the bracelet, that he hasn't told anyone about, but we will se them in a flashback cause they were there all the time.

I said that PJ might have known RJs identity since the begging of the show and that would be the coolest, but i can't see how that would explain any of his actions these last 6 years. why fake the meltdown if he knew, and why kill T. Carter? Only reason i can see that would explain this is that PJ needed some sort of dirt on RJ. But then again why move now, what did he learn these last few episodes that made it ok to strike now. Again in sherlock (spoiler!!) Sherlock waits till he has Moriartys blacklist which the audience didn't know existed, maybe PJ wants something like that.
My other theory is that PJ learned RJs identity in the park, when he was dressed as a woman. That would mean that every moment from thereon out is a play. That would explain his lack of interest in the rest of the suspects the next couple of episodes. He gave Partridge that whole "you really don't know?" but nothing for the others hmm.