Exclusive Criminal Minds Sneak Peek: Reid Is Still Not Over Morgan's Departure

Frances Fisher is playing some serious mind games with a very fragile Reid (Matthew Gray Gubler) on Criminal Minds.

The actress guest-stars on Wednesday's episode (9/8c, CBS) as convicted serial killer Antonia Slade, who was put away 15 years ago by Gideon (Mandy Patinkin) -- and might now have info on two missing boys.

Shemar Moore on his Criminal Minds exit: "I'm proud of the way things ended for Derek Morgan"

In the exclusive sneak peek above, when Reid questions Antonia in her cell she turns the tables on him and preys on his sadness over Morgan (Shemar Moore) leaving last month.