Sue and Dimitrius put an operative in the field to take down an illegal arms sale - but when the encounter gives them a chance to land an even bigger fish, Dimitrius goes undercover as the bait. Meanwhile, Dimitrius wife Donna has some unexpected news of her own.

When the members of a think tank are found shot dead, Sue and the team track down the sole survivor - but is he a possible future victim or the murderer? By accident, Sue ends up in the fleeing man's car. And Sue teaches Levi some new tricks - or maybe he's teaching her.