MacLaren and his team try to regroup -- and sell a cover story to their loved ones -- at a remote FBI safe house, unaware that the government is keeping an eye on all of them. Elsewhere a young agent is recruited to deliver a message for the Director.
A controversial TV host aims to expose the Traveler network, and Mac and Yates are assigned to protect him after he is threatened. While David tries to retake control of his life, Jeff takes custody of his son.
MacLaren tries to recover the events of a missing day when he discovers that his team has erased his memory -- leading him back to a young boy with a disturbing future.
After a mysterious group kidnaps Traveler 001 MacLaren's team is tasked with finding him. Philip's condition continues to worsen, and Kat's fears grow worse. Jeff confronts Carly and the others.
A young girl's experience as a messenger for the Director leaves her mentally disturbed by a rogue A.I. Meanwhile "Jeff" adjusts to his new host's life, and David seeks out a way to protect himself.
Philip and a group of historians are taken by the Faction, who hope to use them for their own ends. When Hall is critically wounded, the team put his mind into a digital construct in order to retrieve intel about his final mission.
After learning that he is suffering from a temporal brain disorder Trevor works to put his affairs in order -- having agreed to allow the Director to overwrite his host with a new Traveler. David loses someone close to him, and Carly moves into a new apartment.
While Trevor helps Philip cope with his perception of multiple timelines, MacLaren clashes with Yates after he learns that a serial murder suspect in custody is in fact a Traveler on a critical mission. Jeff's solo mission leads him to a kidnapping victim of unique importance to the Director.
As the globe reels from a series of nuclear explosions set off by the Faction, Marcy discovers that an injured David has been trapped inside a Traveler Archive vault. Elsewhere, Jeff finds himself a prisoner.
With the team off balance following a personal loss, the Director invokes a bleak final protocol that could spell the end of their timeline. As tensions mount with the F.B.I., Philip's perception of alternate timelines intersects with a dark tragedy.
