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.

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.

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.

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.

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

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

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

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

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

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

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.

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.

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.

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.

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

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