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.
Miranda and Liam pay a deadly price when terrorists attempt to infiltrate Quantico; while in the future, Alex gets further instructions from the terrorist as Claire Haas' life hangs in jeopardy.
The NATS are challenged to cross the U.S./Canadian border without passports to learn about human trafficking; in the future, Simon puts his life at risk to continue helping Alex find the terrorist.
Alex, Shelby and Iris learn some surprising things when they do background checks to determine who gets high-level security clearance; in the future, Alex contacts Claire Haas to find her missing friends.
A training exercise is too close to home for Shelby; in the future, Hannah becomes an Ally to Alex and tries to stop the terrorists from making another strike.