As Criminal Minds wrapped the finale of its ninth season on May 14, speculation about the tenth season has already begun and the rumor mills and the producers of the show have some tidbits for fans.

Season 9 Finale Will 'Leave Everyone Slack Jawed'

A lot of hints are being picked up from the season ending and the latest rumors suggest that Reid (Matthew Gray Gubler) will be coming back for the next season while Blake (Jeanna Tripplehorn) might be on his way out.

Recently A.J. Cook, who portrays Jenniffer "JJ" Jareau, spoke about how the finale of season 9 "would directly impact season 10."

'You Won't Believe' Who 'Will Say Goodbye Forever,' Says Show Creator? 

Here's the official synopsis for Demons:

"The BAU continues its murder investigation in Texas, and clues uncover a deep web of corruption that could be the motive for the killings. Meanwhile, as one team member's life hangs in the balance, another concerned BAU member must face a sad secret from the past, and Garcia is thrust into action to save a colleague, on the conclusion of the two-part ninth season finale of Criminal Minds."

Things to 'Get Personal' as a 'Sad Secret' is Revealed in the Finale?   

The second part of the finale, Demons, aired on Wednesday, May 14 on CBS at 9 p.m. ET/PT.

Watch the preview for Demons: