‘The Mentalist’ Finally Reveals Identity of Red John After Six Seasons

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After six seasons, fans of CBS’s “The Mentalist” finally learned who the serial killer (known as Red John) was during Sunday night’s episode. Xander Berkeley, who plays Sheriff Tom McAllister, stopped by the “omg! Insider” newsroom on Monday to dish on his character’s big reveal. So was he surprised when he found out his character was Red John? “"I felt I was the least likely of all the suspects but then sometimes that's what makes you the most likely," he told us.