The BAU brainboxes are back for season nine of the US crime drama Criminal Minds.

Following last season's blood-freezing finale, which saw the sudden death of BAU Section Chief Erin Strauss, there's an air of uncertainty among the FBI profilers. Hotch is tipped to take her place and trade in the field for a desk job, causing his colleagues to worry about how they'll fare without him.

Before any decisions are made, though, there's a case in need of immediate attention in the first episode: the discovery of two female bodies in Arizona, both shot in the heart and propped in a praying position. To get up to speed with the Criminal Minds story so far, click on and catch up. 

Emmy Award-winning actress Camryn Manheim and Fred Koehler guest star in this premiere fix and a host of special appearances lie ahead, including CSI: Miami alumnus Eva La Rue and the return of fan favourite Paget Brewster as agent Emily Prentiss in the series' milestone 200th episode.

Season nine of Criminal Minds is on Mondays at 9pm.