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.

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.

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 team tackles their primary mission: stop a cataclysmic event that could change the course of human history.

While MacLaren, Carly, Trevor, and Philip work with another traveler team to protect a child important to the future, Marcy takes measures to remember her past life – but uncovers more than she bargained for.

MacLaren is kept on a tight leash after the Director orders an assassination.

The team is torn apart when they discover the Director has a hidden agenda.

In the season finale, the travelers must follow the rules of a madman in order to rescue their kidnapped loved ones and ensure the traveler program isn’t exposed to the world.

Trevor defies the Director while the team contends with Marcy’s inevitable death.

Grant MacLaren and his team find themselves in FBI custody with no means of escape, while a mysterious new traveler reveals secrets to his psychiatrist.

A deadly disease is spreading around the world, and the travelers must get to the bottom of where it came from and how to stop it before it's too late.

When the team meets Simon, a homeless man with a startling history, they’re led down a path that leads directly to the very first traveler.

The Faction kidnaps Philip and a group of other historians, forcing MacLaren and the team to extract their location from a critically injured Hall.

MacLaren and the team must help a fellow traveler plan his own assassination, while helping an unsuspecting activist complete a deadly mission.

With the unknown virus rapidly spreading, the team is left with only one option in order to save The Director hundreds of years in the future.

MacLaren and Yates adjust to their new partnership while protecting a TV show host whose inflammatory rhetoric about Travelers has led to tragedy.

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.

Philip makes an unexpected connection, Marcy helps David cope with his trauma, and MacLaren discovers a shocking truth that Kathryn has been hiding from him.

After tracking down a missing traveler, the team is led to some disturbing answers about their kidnapping.

The team learns that Traveler 001 is still alive when the Faction tries to capture him. Doubts about their loved ones worsen for Kat, Jess and David.

A skydiving traveler must try, repeatedly, to save our team from a horrible fate.

MacLaren has to find a lone bomber who kills a newly arrived group of travelers.

Teetering on the brink of death, MacLaren slips in and out of his host's memories.

Philip’s timeline receives an update with some unwanted side effects, Trevor makes a disturbing discovery about his host’s past, and MacLaren deals with the return of a traveler he thought had gone away for good.