"Criminal Minds" is set to come back from its winter break tonight, and fans are excited to finally see Spencer Reid's (Matthew Gray Gubler) date, Cat Adams, portrayed by "Parks and Recreation's" Aubrey Plaza.

As previously reported, Reid is finally getting a date and it was hinted that their date will turn sour. But now, TV Line has revealed that Plaza's Cat Adams is actually a psychopath who has a penchant for bombs.

Speaking to the news outlet, the 31-year-old actress described that playing the role of the villain was hard and "challenging." When asked if it was a fun experience, she replied, "I don't know if fun is the right word."

Plaza continued to share that it was challenging to play the role of a murderer since one needs to think about justifying their actions. "You have to dig deep and go to a dark place," she said.

The actress also revealed that she hasn't watched a lot of "Criminal Minds" episodes, but since she and Gubler are friends, she thought of giving the opportunity a go.

"I just thought playing that role would be really fun. There aren't many opportunities for me to play a psychopath that has planted a bomb in a restaurant and who's holding a gun under a table trying to kill an FBI agent," Plaza shared.

She added that for the most part, the episode will focus on her and Reid. It appears that the brunette may have just dropped a major spoiler for the upcoming episode.

Aside from Cat and Reid's date, "Entropy" will also focus on the mission of bringing down the "Dirty Dozen" ring, which Cat appears to be a part of.

Reid will play a big role since he will be forced to act and think quickly on how to stop a bomb, planted by his date in a restaurant filled with people.