Danny Flaherty

Mapleton, New York, small-town police chief Kevin Garvey juggles personal and professional challenges as the three-year anniversary of The Departure - when millions of people worldwide suddenly vanished - approaches.

Philip and Elizabeth feel the weight of a new family secret while following up on the KGB's interests in South Africa; Stan faces struggles both at work and at home; Martha confronts a shocking development.

Philip must take stock of his life with Martha and make a difficult choice, from which there is no return.

Both the FBI and the KGB compete to try and find an important agent; the Jennings are forced to face the reality of what biological warfare would mean.

Gabriel has surprising information; Elizabeth begins to take family matters into her own hands; Stan receives upsetting news from his past and turns to Sandra for support.

As Paige deals with last episode's trauma, she sees her mother in a new light... and finds she has inherited some of her parents' skills. Plus, has Oleg reached his breaking point with Stan?