Tyler Poelle

The team investigates a serial killer who is targeting women at a small college in Flagstaff, Arizona. The BAU shuts down the campus, creates a detailed profile of the unsub, and arrests a suspect. However, the team members begin to have doubts about themselves when another woman is killed while the suspect is in custody.

Kim goes into labor, and J.D. struggles to decide if he should tell her what he really thinks of their relationship.

J.D's brother Dan returns and delivers a few home truths to his little brother.

A new group of medical students arrives to learn the ropes at Sacred Heart Hospital, where J.D., Turk, Kelso, and acerbic Dr. Cox are the instructors. J.D. continues to romance Elliot as he imparts wisdom to a new class, which includes Lucy, Drew, Cole and Maya.

After a hard day of work, Dr. Cox has the burden to tell his son Jack a good night story, so disguises his hard day as a fairy tale about the little village Sacred Heartlia.

After a series of suspicious murders occur, Prentiss suspects her old Interpol nemesis, making her fear for the safety of her BAU team as he closes in on her.