#84 - The Mentalist: Season 6

Patrick Jane kills "Red John".

Did you know ?..

Xander Berkeley, who played Red John, was born the same year as the Happy Face Killer, Keith Jesperson. According to 'The Mentalist and the Search for Red John', this is one of two reasons he was chosen.
Owain Yeoman is in fact Welsh, he puts on the American accent he uses, which even fooled the other cast members, as he always stayed in character, even when the cameras weren't rolling.