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.
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.
When 3468's team fails the mission of rescuing essential technology for the future, the Director sends additional Travelers to assist the team and complete the mission, putting Protocol Alpha in motion.
After receiving an unusual message to attend a court proceeding, the travelers find that one of their own is on trial for conspiring against The Director and interrupting the Grand Plan.
Philip's timeline gets an update with some undesired side effects; Trevor makes a disturbing discovery about his host's past; MacLaren deals with the return of a traveler he thought had gone away for good.
Marcy attempts a procedure to recover her memories and gets more than she bargained for. The Travelers protect a little girl who is very important to the future. The MacLarens continue to mourn the passing of their unborn child.