An unexpected message upends Iris and Hope's worldview.

Hope and Iris disagree on the mission; Felix and Huck pursue the group as Felix confronts his past.

Burdened by their pasts, members of the group adopt opposing strategies for dealing with a massive obstacle. Pressure is put on the group to return home.

The group bonds and faces threats in a high school.

The group must band together to cross the Mississippi.

A newcomer has information that could help the journey.

While the group searches for something to advance their quest, one of them recalls their struggles in the early days of the apocalypse. A game of truth or dare brings emotions to the surface.

A horrific discovery finds the group at crossroads and prompts one of them to revisit past trauma.

A series of setbacks causes a member of the group to reevaluate their role in the mission. Someone makes a surprising discovery. A startling revelation casts everything in a new light.

A divided group struggles to reunite. Others set their sights on the greater good.