Three episodes to go. The Red John closure was so lame that I have wondered it the show would go out in a bang and Red John would resurface.
Basically Patrick had not killed Red John, rather one of his minion. Then the show could explore other story-lines while Red John lay low.
Now that the show is coming to closure we can have the 'reveal' of the real Red John with resolution in the grand finale.
Now that would be a way for The Mentalist to go out on top.