Sam meets a Viking ghost at the Farnsbys’ house who has an unexpected connection to Thorfinn. Also, Trevor devises a new method for the ghosts to trade favors.
Alex receives information about her father and his FBI past. The NATS learn the art of profiling and focus on their classmates' strengths and weaknesses, ultimately challenging their confidence and camaraderie.
The NATs learn surveillance by putting it into practice with Miranda and her troubled son, Charlie. Shelby tries to keep Caleb at a distance, but Raina opens the door to a closer relationship with Simon. In the future, Alex is helped when she tries to hack into an FBI computer.
A terror cell tries to infiltrate Quantico, forcing Miranda and Liam to pay a deadly price. Meanwhile, in the future, Alex continues to get instructions from the terrorist, with Claire Haas' life hanging in the balance.
