Cole, Dr. Railly and Aaron strive to stop the virus from being deployed as a bioweapon in Chechnya.

Cole splinters to Tokyo, 1987 in a last chance effort to stop the Army of the 12 Monkeys.

Cole gets stranded in 2016 after an attempt to destroy the virus changes the future. Jones and Railly deal with the consequences of the changed timeline.

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.

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.

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

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

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

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

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.

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