When several random citizens are possessed by people from the future, FBI agent Grant MacLaren discovers their critically important mission.
MacLaren and the team adjust to unexpected challenges in their new lives while trying to prevent an antimatter detonation that could kill thousands.
Wracked with guilt, Philip defies the rules in an unauthorized attempt to alter the future, resulting in violence and the exposure of his secret.
After rescuing a more experienced team, MacLaren and the other Travelers discover that not everybody from the future is playing by the same rules.
Kidnapped by a faceless nemesis who seems to know their secret, MacLaren's team is held captive and interrogated while he scrambles to find them.
The team prepares to fulfill its primary mission, which will save millions of lives but could possibly spell disaster for their own futures.
Unsure if their mission succeeded, the Travelers face the prospect of living out the rest of their lives in their challenging 21st century personas.
MacLaren handles a misfired Traveler while Trevor and Carly deal with personal issues, and Philip notices a minor change to the timeline.
Circumstances force MacLaren to go off-mission during an unusual solo assignment involving his wife, politics and a catastrophic air disaster.
Surgeons work to save MacLaren as he hovers between life and death. The team tries to cover up the situation as suspicions grow at work and home.
Marcy's condition deteriorates, requiring two new Travelers to attempt an experimental procedure that could keep her alive, but at a high cost.
An assassin Traveler arrives in the present, exposing the truth about a disturbing schism between warring factions that is unfolding in the future.
MacLaren, his team and their loved ones regroup at a safe house protected by the FBI, but doubts and betrayals may sabotage the rest of their mission.
MacLaren and Yates adjust to their new partnership while protecting a TV show host whose inflammatory rhetoric about Travelers has led to tragedy.
Certain that his team erased his memory of the previous day, MacLaren retraces his steps in the case of a disturbed youth with a horrific future.
The team learns that Traveler 001 is still alive when the Faction tries to capture him. Doubts about their loved ones worsen for Kat, Jeff and David.
The team attempts to extract a rogue A.I. from a child messenger, but the program expands too rapidly. A new Traveler adjusts to his host.
The Faction kidnaps Philip and a group of other historians, forcing MacLaren and the team to extract their location from a critically injured Hall.
Suffering from a fatal brain disorder, Trevor makes the choice to allow himself to be overwritten as the team races to invent an experimental cure.
MacLaren urges Yates to help him when a Traveler with a mission vital to humanity's survival arrives in the body of a just-captured serial killer.
The Faction sets off nuclear blasts that destroy all of the Travelers' archives, except the one in which a wounded David just happens to be trapped.
Shattered by recent losses and a sweeping new protocol, the Travelers face a bleak future with only one long-shot chance to succeed in their mission.
Held in custody, MacLaren's team tries to escape and destroy the quantum frame, while an eccentric Traveler confesses his story to a psychiatrist.
MacLaren and Walt pursue a mysterious, unexpected group of new Travelers, while Marcy helps David recover from trauma and Philip makes a new friend.
Three months after the team's last assignment, the discovery of bodies at a construction site alerts the Travelers to a global pattern of killings.
Two team members assist an activist in preventing the release of an agricultural product, while the others help a Traveler plan his own assassination.
Assigned to prevent a flu-like outbreak, the Travelers are shocked when the pathogen seems to evolve, becoming fatal and spreading across the world.
Outflanked by members of the Faction, MacLaren's team races to acquire uranium, bring the Director back on line and halt the spread of the pandemic.
When the team is wiped out during a mission to a remote lake, a Traveler repeatedly transfers into a nearby skydiver to make a frantic rescue attempt.
MacLaren and his team are summoned to the formal hearing of Traveler 0027, who is charged with undermining both the Director and the Grand Plan.
Philip attends a disturbing historical update session, MacLaren's wife has a medical emergency, and Trevor learns something shocking about his host.
The Travelers guard a little girl who has a big future, while Marcy recalls more than expected when she attempts a procedure to recover her memory.
An incoherent homeless man turns out to be a brilliant but delusional Traveler who knows the identity of the team's powerful nemesis, Traveler 001.
Traveler 001 stays one step ahead of MacLaren's team by taking each of their loved ones hostage and forcing the Travelers to divulge their identities.