S5E1 · Amber Waves

Complete story — includes the ending

Philip and Elizabeth have a new assignment investigating a Soviet defector, an agricultural expert named Morozov, and his family. They have false identities as an airline pilot and a flight attendant and work with a young agent posing as their adopted son Tuan. They continue to disapprove of Paige's growing relationship with Matthew. Paige is still fearful and Elizabeth teaches her more self-defense. Oleg has returned to Moscow and works investigating food chain corruption, a job which may be dangerous for him and his family. Mischa leaves the USSR without permission, alarming Claudia and Gabriel, who think he might be headed to Philip. The KGB dispatches a six-person team, including the Jenningses and Hans, to retrieve a sample of weaponized Lassa fever from William's infected body, which is buried in Fort Detrick. The group cuts through a fence at the fort and dig up William's body. Hans stumbles in the grave and cuts his hand. Knowing that he is infected, Elizabeth kills him.