Jones comes to the disheartening realization that time travel is humanity's true enemy and that as its architect she needs to be stopped, and so she sends Railly back to the year 2020 with orders to undo all of it.

To save the last Primary, Cole must turn to a mortal enemy. Plus: Jennifer Goines, radical revolutionary?

With the temporal facility on the verge of destruction, Cole and Jones find themselves in the middle of a coup. After a violent encounter ends in an unexpected tragedy, Cole is sent back to 1957 in a last-ditch effort to save humanity while the rest embark on a caravan across the apocalypse to find Titan -- the stronghold of the Witness.

Cole and Railly attempt to stop the final paradox in the past while Ramse, Jennifer and Deacon struggle to survive the apocalypse in a last ditch effort to find the Witness.

Cole and Railly have finally found peace living in the past. When a mysterious woman with apocalyptic visions of the future tells Cole it's not over, he must do the unthinkable to save the world... and the woman he loves.

In the apocalypse of 2163, a desperate Cole searches for Titan. Meanwhile, a captive Railly is faced with an impossible choice as the 12 Monkeys await the arrival of The Witness.

Bonds of trust are tested when Ramse returns to the facility with an old enemy held captive. How far will Cole and Jones go for the answers they need?

Out of time and in need of answers, Jennifer and Deacon are sent to 1989 to steal the a sacred document. Can Railly and Cole get to the Word first before it reveals the one secret they want kept?

Cole and Railly find themselves at opposite ends of an unspeakable decision. Jones grows suspicious while Railly turns to an emotional ally for advice. All hell breaks loose during a massive fire-fight.

Former friends, now enemies, race to find the Witness in 1904, who, at last, reveals his face.

The final battle with the Witness begins.

The final conflict with the Army of the 12 Monkeys begins when the Witness returns to Project Splinter.

Team Splinter goes back in time to the wild, wild frontier in search of a weapon to destroy the Witness.

A clue to breaking the cycle leads Cole and Cassie to the 1960s. Christopher Lloyd returns as Zalmon Shaw, a devoted follower of the Witness.

Jones sends Hannah back in time to 2007 on a personal mission that could be the key to everything.

Everything changes when the team finally climbs the steps... and rings the bell in the Middle Ages.

The beginning of the end as Cole and Cassie embark on their final mission.

When all hope is lost, Cole must complete his cycle so that his younger self will one day arrive at the end with the answer.