Tyler Poelle

The team are called to shut down a campus in order to create a profile for a killer, but they have doubts about the main suspect after taking them into custody.

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.

JD and Turk grasp an opportunity to one-up Dr Cox after he fails to diagnose one of his patient. Meanwhile, Elliott and Carla tries to prevent Dr Kelso from retirement.

After a rise in deaths caused by black market opioid use, the team links the street drug to funding for terrorist activities.

The staff of Sacred Heart receive a lesson in being environmentally conscious from the janitor. Meanwhile, JD's brother makes an appearance to share a hard truth.

Callen continues hunting Katya; Kilbride enlists NCIS to help find a truckload of stolen guns, but the assignment becomes more challenging when their suspect is found dead.