Traci worries that she mishandled the investigation into a car accident that yielded a dead body; Chris realizes he has feelings for Gail.
Alex, who thinks Elias didn't act alone, must testify about the terrorist bombings at a congressional hearing; flashbacks at Quantico reveal heightened tension when new NATs join Alex and her classmates.
Nathan and Vince travel back to 1983 to learn the secret of how Croatoan has found a way into Haven. Meanwhile, Duke finds his life on the line when he is apprehended by a mysterious foe.