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.
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.
The team joins forces with the FBI when a Marine is murdered by nerve gas, and Deeks shares his dream of quitting law enforcement to open a bar.
After a rise in deaths caused by black market opioid use, the team links the street drug to funding for terrorist activities.
