The Mentalist will close the book on a six-season long story arc this Sunday but the end of an era doesn't mean the end of the show.

Patrick Jane's (Simon Baker) will come face to face with his greatest nemesis in this week's "Red John." After chasing the serial killer for so long, Baker claims that finally finding the man behind the smile may be a little disappointing for some.

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"I always felt what was scary was the fact that it could be the guy that you see every day on your way to work that's watering his lawn two blocks away ... the everyday guy that is a serial killer," Baker told TV Guide. "So when we found out it was who it was - I think, ultimately with anything like this, there's a level of disappointment. When there's mystery, you paint the picture in your head of what it's going to be, and particularly when it's a mystery that holds you under water for so long, the mystery of who it is is mythical. The truth is, it's just a person."

However, this person has cast a dark shadow over the faux psychic for almost a decade. Viewers have never had the chance to see who Jane is without a layer of guilt and a desperation for revenge.

"In a very real sense, Jane is a happier person," said series creator Bruno Heller, according to TV Guide. "A weight has been taken off his shoulders, and to that degree a weight has been taken off the show. So, it's going to be the same show to some degree, but it's going to be a show with less darkness at the edges, and more freedom to roam."

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Right out of the gate, The Mentalist will roam two years into the future while its characters scatter across the Americas, according to the USA Today. Jane will no longer be in the States and his former coworkers will be working jobs outside of the CBI.

Catch the climactic episode of The Mentalist this Sunday at 10 p.m. ET on CBS.

Tags: The Mentalist CBS television