Season 4 Episode 20 episode 20

The Mentalist Season 4 Episode 20 "Something's Rotten in Redmund" Promo

The Mentalist Season 4 Episode 20 "Something's Rotten in Redmund" Promo

Patrick Jane is going back to school. Can this class clown catch the class killer? Here is the first promo for The Mentalist season 4 episode 20 "Something's Rotten in Redmund".