It's anything but a happy reunion when Ed Asner drops by on Wednesday's Criminal Minds.

After Hotch's father-in-law Roy (Asner) breaks into his old store, Hotch (Thomas Gibson) has to come to the rescue and decides to put Roy, who has Alzheimer's, in a nursing home. "I've been to these places before. They take you there to shrivel up and die!" Roy says in the exclusive sneak peek above, before hitting Hotch where it really hurts. (Hint: Haley's death.)

Exclusive first look: Ed Asner comes to Criminal Minds as Hotch's father-in-law

"He's amazing and the fact that he's Haley's dad just brings so much amazing drama to that part. It's really just heartbreaking," executive producer Erica Messer tells TVGuide.com. "We did an unsub with Alzheimer's, but not a family member with it. Of course it's a very complicated relationship. Thomas was very involved in that story line. Any time we revisit a Haley situation, it pulls on the heartstrings."

Asner was only slated for one episode, but could potentially return. "It's certainly that type of story we could revisit," Messer says.

Criminal Minds airs Wednesdays at 9/8c on CBS.

(Full disclosure: TVGuide.com is owned by CBS.)