Red John
Red John is a fictional character and the primary antagonist of the CBS crime drama "The Mentalist" for the first five seasons and half of the sixth . 
<triplet> Red John <subj> antagonist <obj> narrative role <subj> The Mentalist <obj> present in work <triplet> antagonist <subj> fictional character <obj> subclass of <triplet> The Mentalist <subj> CBS <obj> original broadcaster