With Ben and Jennifer in peril and the Cleanse underway, the family unites for one last fight to save the world — and end the infinite devastation.

Lila and Five get lost traversing various timelines. Meanwhile, Viktor and Reginald aim to stop Ben, whose union with Jennifer sets forth a lethal path.

After learning the truth about Jennifer, the crew sets out to find her and Ben. Klaus hustles to escape his plight. Five and Lila try to change the past.

The group splits up to find Jennifer. Later on, they pay Reginald a visit, confronting memories that hold critical clues to their mission.

With their powers restored, the gang embarks on a mission to find Sy Grossman's daughter. But they soon encounter hostility in a seemingly quaint town.

The family teams up to find a kidnapped Viktor while attempting to adjust to normal life. Lila and Five probe a mysterious group called the Keepers.