Messages from the dead arrive while Dan follows Melody on her investigation into the Visser. But who’s watching the watcher — and what lies below?

The past loops back around as Melody returns to Steven with Jess. Mark checks out a find. Dan tries to map his situation, but he may be losing his way.

The team investigates an extremist gun group after an anti-gun lobbyist building is bombed; SAC Bashar dangles a possible promotion for OA.