Hundreds of years in the future, the last surviving humans discover a way of sending consciousness back through time, directly into people in the 21st century — “travelers,” who assume the lives of seemingly random people. They’re also secretly working as teams to perform missions in order to save humanity from a terrible future. Armed only with their knowledge of history and an archive of social media profiles, the travelers — who include an FBI agent, a single mother and a college student — discover that 21st-century relationships are as much of a challenge as their high-stakes missions.

1.12 Grace Air Date: December 23, 2016

Kathryn confronts MacLaren about an affair she believes he is having, leading him to end his relationship with Carly. Charlotte, the misfire historian, is overwritten and murders her team. She attempts to assassinate Grace, but Trevor stops her. Grace reveals that the anti-Director faction was responsible for the team’s abduction. Charlotte is shot by Jeff while attempting to kill Carly. Ellis reveals that he has built a quantum frame that the Director, an advanced AI, can use to travel to the present to escape the faction. David is held at gunpoint by another assassin but is saved by Marcy. The team arrives at the farm where Trevor has received a text to destroy the frame. Boyd reveals she received an order to kill MacLaren and holds him at gunpoint; Carly later reveals having been given the same mission. Assassins surround the farm as Ellis shoots Trevor to keep him from harming the frame. Grace jumps in front of Trevor and is shot as well. Ellis shuts down the perimeter shield in the hope that the Director will help them and delivers a message to destroy the frame shortly before he dies. It is revealed that the people surrounding them are not anti-Director assassins, but FBI agents led by Forbes.


2.04 11:27 Air Date: December 26, 2017

The Director assigns two new missions to the team: Mac, Carly and Marcy must assassinate Congressman Bishop in order to make him a martyr while Trevor and Philip must help a radical environmental activist succeed in her plan to bomb a research facility that is working on a genetically modified seed that has disastrous consequences for the future.


2.07 17 Minutes Air Date: December 26, 2017

The team is given a mission to collect and safeguard the original power source of the Director, as it will likely be the remaining Faction members’ next target. The mission is going smoothly, but the team is ambushed and killed by the Faction. With its very existence in danger, the Director initiates Protocol Alpha – and sends back a Traveler to save the team before they are killed, but the remote location, small time window, and only two host candidates within geographic range makes the probability of success low.


2.08 Traveler 0027 Air Date: December 26, 2017

Three high-ranking Travelers are sent back by the Director to put Grace on trial for violating protocols, overwriting a person who was not assigned to be her host, and sabotaging the Grand Plan. Mac and the team must give testimony at the trial that will determine if she should be overwritten or not. Meanwhile, the Faction is trying to replenish its numbers by overwriting people with the stored minds in the Quantum Frame. It transpires the trial was staged by the Director to flush out a Faction member from within the three Travelers judging Grace, which it successfully does, this leading to Mac’s team securing the Quantum Frame.


2.09 Update Air Date: December 26, 2017

Philip is ordered by the Director to attend an “update” with various other Historians, which is where the altered timeline’s history is imprinted onto their minds, but it comes with physical and emotional consequences. Trevor tries to help a former football teammate with past trauma. Hall returns from prison and has a new mission assigned to him from the Director. Kat has complications with the pregnancy.


3.04 Perrow Air Date: December 14, 2018

The team learns that Traveler 001 is still alive in the body of his former psychologist, Perrow, when the Faction tries to capture him/her. Perrow dies but they believe 001 had access to a transfer device (since in the future he helped construct one) and as a result they are unsure where his consciousness now resides. Jeff, confronting the Travelers with his knowledge of their existence, is overwritten by a new Traveler. Grace grants a 21st century AI called Ilsa access to the Internet so MacLaren and his team can use it to find Traveler 001. Doubts about their loved ones worsen for Kat (suffering hallucinations and suspicions), Jeff (now, not Jeff and trying to make amends) and David, who is concussed.


3.05 Naomi Air Date: December 14, 2018

The team attempts to extract a rogue AI from a child messenger named Naomi, but the program expands too rapidly. Trevor starts to exhibit a brain disorder. A new Traveler, Traveler 5416, who is on a solo mission from the Director, adjusts to the body of his host Jeff Conniker.


3.08 Archive Air Date: December 14, 2018

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.


3.10 Protocol Omega Air Date: December 14, 2018

Protocol Omega means the Director is no longer intervening in this timeline as either the Traveler program succeeded in its mission or it has totally failed. When Jeff visits Marcy to offer his condolences, she realizes he has been overwritten by 001 and eventually kills herself to prevent him obtaining Ellis’ backdoor code from her brain. 001 uploads his consciousness to the internet, enabling him to exist into the future and ultimately gain control. He sends the consciousnesses of his followers into world leaders, provoking the Russians and Chinese to launch nuclear warheads against the US. Yates blames MacLaren and his team for hastening, rather than preventing, the end of mankind. MacLaren uses 001’s machine to send his mind back to the August 2001 day when his host first met Kat. He tells her to give John a second chance, later drops off a warning about Helios, then on September 11 arrives at the same office high in the World Trade Center a few minutes before 001’s expected arrival, meant to kick off the Traveler program. MacLaren sends an email, knowing the Director will find it, stating: “Traveler program will fail. Do not send 001.” As 001 did in the previous timeline, he leaves the office with time to spare in order to survive the imminent attack. The non-Traveler Marcy, showing no signs of hydrocephalus and working as a nurse, happens to sit beside David on a bus, and he strikes up a conversation, renewing their seemingly inevitable connection for a third time. The Director decides that Traveler program version one has failed, and begins version two.

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