Paul Zies

The staff tries to deal with physical and emotional trauma in the wake of the vengeful gunman's deadly rampage; Derek makes a spontaneous decision to resign as chief and return to surgery.

The BAU must catch a group of serial killers that is killing exotic dancers and leaving their bodies in the cornfields of Indiana.

The team investigates the murder of a food scientist whose body was put through a meat grinder and mixed into canned stew. Meanwhile, Angela puts together a post-wedding bachelorette party for Brennan.

When a gang finds and kills an undercover agent, the team must find the mole before other agents become endangered.

Jane goes undercover as a prisoner in a county jail to draw out a killer who committed a gruesome homicide.

Randall and Rebecca embark on a road trip and reflect on their past.