The 'Criminal Minds" agents are back this Wednesday and they are going to handle another twisted case that will leave fans hanging on to the edge of their seats. If you are a "Fifty Shades of Grey" fan, the new episode will surely be a lesson for you. The BAU is set to track down a killer who happens to have this extreme sexual fantasies that often end up in a bloody mess.

CBS' long-running procedural drama will give everyone their unusual dose of BDSM fantasies. The preview for the upcoming episode alone gives away the new case the BAU is going to handle. According to the sneak peek, the serial killer has extreme sexual desires and "whose fantasy is 50 shades of pain." Yikes!

While the team will take on the UnSub, Kate will face some personal issues on her own. Apparently, she will begin to act out when she finds it difficult to deal with her niece, Meg. Showrunner Erica Messer revealed that Kate Callahan will also have to deal with her bun in the oven. This is of course the show's plan of incorporating actress Jennifer Hewitt's real-life pregnancy into the show. And this will be introduced in tonight's "Criminal Minds" season 10 episode 17.

"She's been acting out a little bit, and we reveal ... it's because Kate is gonna have a baby," Messer told TVGuide. "The fact that she and Chris decide to have a baby rocks Meg a little bit. Even though she's been raised by amazing people, there's an underlying abandonment since her parents were killed when she was very young."

"She's trying to deal with that and being 13 and navigate the world and see her place in it. All of that is by design," Messer added. "We might hit it again before the finale."

The official synopsis of "Criminal Minds" season 10 episode 17 reads: "The BAU is called to Wisconsin in search of a serial killer, and the team looks for a connection among the victims for clues to the UnSub. Also, Kate has trouble dealing with her niece, Meg, when she begins acting out."

"Breath Play" is set to air this Wednesday night at 9/8c on CBS. Watch "Criminal Minds" season 10 episode 17 online an hour after it airs on TV using this free online stream link here.