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.

While searching for Jennifer Goines in post-WWI France, Cole and Jones encounter a dangerous group of time- travelers - the Guardians.

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?

Ramse and Cole splinter to 2007 expecting either a trap - or a final chance to kill The Witness. But when Cole discovers a heartbreaking truth, he’ll discover that the mission was both.

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?

In 1953, Cole and Railly reunite with Agent Gale at the birth of the Army of the 12 Monkeys.

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 reason why the Witness wants to destroy time and all reality is revealed.

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.

Travelers come face to face with ghosts from their past when they find themselves maneuvering around their own timelines.

Cassie travels back in time to confront a younger Olivia; Cole helps Jennifer find the meaning behind her final Primary vision.

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.

The team infiltrates a Nazi gala to steal an artifact known as 'Die Glocke'. Their operation comes undone when French Resistance interferes and an unexpected guest arrives.

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.

The final battle against the Witness as the fate of time and mankind hangs in the balance. All the pieces finally come together to mark the end of the beginning.

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.