Last night's Criminal Minds showed us that a killer isn't always who you expect. There are no stereotypes for the criminally insane ... it could even be the boy next door.

Next week's episode is Halloween themed. While virtually every show feels the need to do an episode around this day, it's not a stretch for Criminal Minds whatsoever.

Even by crime drama standards, there's a lot of blood. Wednesday, the BAU hunts a killer who strikes Detroit every year, and solely on the raucous 30th of October.

Here's the first promo for a gruesome "Devil's Night" ...

[video url="http://www.tvfanatic.com/videos/devils-night-promo/" title="Devil's Night Promo"] [/video]

Steve Marsi is the Managing Editor of TV Fanatic. Follow him on Google+ or email him here.