Tyra shows up for an unexpected photo shoot but the ladies struggle to get in touch with their sexy side.

The BAU travels to a small Texas community to investigate the murders of children. Meanwhile, Elle is having readjustment issues after being shot, and Hotch becomes worried about her when she misses a mandatory psych evaluation and isn't answering her cell phone.

Tonights guests include Julia Louis-Dreyfus, Jay Thomas and John Legend.

Returning to the most controversial myths. More past experiments to see if their original answer was genuine or bogus. So Stop Writing Us!

Satan is throwing the world's biggest Halloween costume party, and no one is getting in without a blue wrist band. Unfortunately, even Satan can't plan for everything as a religious organization and the antics of the most notorious serial killers of all time might ruin his good time.

In order to keep their team together, one team will have to step it up after back-to-back losses. The weekly temptation will not make things any easier, as the losing team will be left without their trainer and have to order takeout for the next 72 hours.

An Asian culinary theme runs through this episode's challenges. First the contestants put their own twists on sushi, then they work as teams to participate in a charity event. Guest Judge: Hiroshi Shima – QuickFire Challenge. Guest Judge: Ming Tsai – Elimination Challenge QuickFire Challenge: Create a Sushi Dish in 30 Minutes. Elimination Challenge: Work as Two Teams to Create One Hot and One Cold Dish Using Flavors from Korea and Vietnam.