Season 7 Will get air in 30th November 2014.

http://deadline.com/2014/11/the-mentalist-final-season-premiere-date-undercover-boss-cbs-1201273104/

Jimmy Gadd on twitter:

It's very exciting, so that meant CBS will have a promo soon! Sad news is that it's our last season. But hey! We'll go out with a bang.

https://twitter.com/jimmygadd/status/529720728971915264