MacLaren’s leadership is challenged when he’s directed to assist a more experienced team of travelers that wants to join forces.

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

The team struggles to live 21st century lives as they’re faced with the prospect that their missions might be over for good.

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

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.

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.

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