He is MacAllister!
Thats the only name that make sense. It is not "HE IS MAN" or "MAR"...

En la temporada 5 hay un capitulo lleno de simbolismos, en el,cual jane resuelve un caso, solo con la ayuda de su subconsiente, es tan obvio el simbolismo que nos da la serie que hasta miedo da, jane toma te de belladona, y en su viaje, visitanvarios lugares e inclusive , participa en la toma de deckaracion de una mucama latina, que le dice que vio hormigas negras y eso essimbolonquenalgo malo va a ocurrir, luego le entrega su garra de agula y le dice, ten , esto te ayudara a encontrar al responsable.... posteriormente jane sale... y cuando regresa de su viaje de belladona, jamas hace referencia de nuevo a esa mucama latina.  Ahora observa el capitulo y dime... que hace jane despues con esa garra, inmediatamente despues de salir a seguir al conejo?..

Not accusing anyone here, just wanted to point out something interesting -

In Season 1, when the wrongly convicted prisoner that has info on Red John is murdered written on the wall is "He is Mar" or perhaps "He is Man"

Most assume that this clue has something to do with Red John but I couldn't help but notice that after the Red John saga supposedly concludes after episode 8 the rest of the episode titles are based off the color blue instead of red. "He is Mar" or "He is Sea" = "He is Blue" perhaps signifying that whoever murdered the ex-con wasn't Red John but this new blue-themed threat?

Obviously not a fully-formed theory, just thinking out loud in writing form, figured I'd throw it out there

Nicholas bishop has to be the evil twin for simon baker
And he's English
Google n you will find out how much he is the twin