CBS announced the pickups for the next season and The Mentalist is one of the shows that will be officially coming back. We've been told several times by writers and producers that the show would certainly have a 6th season, but due to the low ratings, thanks to CBS that moved The Mentalist for the Sunday nights "death slot", fans were very apprehensive. We needed an official confirmation and here it is! Congratulations to the cast and crew! Season 6, here we go!
Source: Hollywood Reporter.