Insider Facts from Criminal Minds, 'Entropy'

Aubrey Plaza guest-starred.

1. Aubrey Plaza guest-starred.

In this highly-anticipated episode, Reid went undercover to expose one of the members of the "Dirty Dozen." Famed actress Aubrey Plaza guest-starred as Cat Adams in the heart-pumping episode.
Cat turned the tables on Reid.

2. Cat turned the tables on Reid.

Talk about a bad date! In an elaborate game of cat-and-mouse, the team realized that this takedown would not be as simple as it seemed.

Aubrey Plaza and Matthew Gray Gubler aren't strangers. The two actors are friends and worked together on the 2014 film Life After Beth.
What's in a name?

3. What's in a name?

Harry and Glenn's Grill, where the elaborate sting took place, was named after Criminal Minds Producers Harry Bring and Glenn Kershaw.