Knock, knock... who's there?

The creepy Criminal Minds Season 9 premiere, that's who.

CBS has released the first official preview for the September 25th opener, which will be titled "The Inspiration" and which will feature an Emmy-winning guest star in Camryn Manheim. Check out footage from the upcoming episode now:

The network also posted a synopsis of the installment. Check it out below and then follow our link for the first NCIS Season 11 promo as well:

The hunt for a methodical killer takes the BAU to Arizona to search for an increasingly devolving UnSub, and the team speculates that Hotch is in the running to be the new BAU unit chief. Guest stars include Emmy Award-winning actress Camryn Manheim as Carla Hines and Fred Koehler as her son, Wallace Hines.

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