On The Mentalist Season 5 premiere, viewers will watch as the CBI is forced to team with the FBI and as Jane tries to determine the connection between Lorelei and Red John.

That opener airs on September 30.

But fans may now be looking forward even more to the second installment of the fall, as executive producer Bruno Heller confirms we'll meet Jane's daughter on October 4. Wait... what?!?

Actress Dove Cameron has been cast as Jane's offspring - despite the fact that she was killed by Red John - with Heller refusing to reveal whether we'll meet the young one via a dream or a flashback.

"That’s the whole nub of the episode," he tells TV Line, referring to the upcoming hour as a "big" and "wonderful" one.

How do you think she'll be introduced? Ponder that question as you read more The Mentalist casting news at TV Line.

Matt Richenthal is the Editor in Chief of TV Fanatic. Follow him on Twitter and on Google+.