Tennant and NCIS must take down a notorious team of international thieves before they complete their final big job and disappear; Kai searches for a new place to live; Lucy and Whistler have a standoff about their previous encounter.
The BAU team face of their toughest cases yet when a prolific, border-crossing serial killer leads them on a hunt into Canada.
Neal infiltrates a corrupt Wall Street brokerage firm; Peter is forced to go under cover alongside Neal.
Captain Milius continues to work with Tennant and her team in the aftermath of the prisoner exchange between U.S. and Eastern Europe; Whistler takes Ernie's advice and makes a grand gesture in hopes of winning back Lucy.
When Tennant interrogates a suspect during his helicopter transfer and the helicopter crashes, she must utilise her skills to save herself and the other passengers.