Maggie turns to a person from the past for answers about the mystery; Rachael's secret ends up in the wrong hands; Bellamy and Pastor Tom try to reassure residents.

Tom leads the search for Rachael, as her situation becomes increasingly dire; Maggie and Dr. Ward make a series of unexpected discoveries.

The return of the dead reaches critical mass, sending the town into chaos; Sheriff Fred implements his own agenda, triggering an unexpected siege.

Bellamy and Sheriff Fred get a report that someone is living in Caleb Richard's old hunting shack. The pair fear that Caleb may have returned. Janine moves back home, in hope of saving her marriage.

Tom starts a new parish for the returned. Bellamy confesses as human bones are found in the river.

Margaret tries stopping Barbara from interfering with her relationship with Fred and Maggie. Bellamy struggles to keep his secret hidden, as he's forced to take desperate measures as the illness continues to spread.

Rachael refuses to accept any treatment for the virus as she is concerned for the safety of her unborn child. Elaine's brother Ray comes down with the disease.

Anti-Returned rhetoric increases with Pastor Tom's church becoming a refuge.

The death a beloved member of the community leaves Arcadians in mourning whilst a cure for the virus is provided by stem cells from Rachael's baby.