After a series of inexplicable events, Bellamy fears for the safety of Rachael and her unborn child. Preacher James predicts that the baby's birth will unleash an ancient evil. Margaret rallies the Returned at the government facility and forms an uneasy alliance with Preacher James, and Bellamy's government contact warns that something big is on the horizon,

Margaret convinces Lucille to host a dinner to celebrate Jacob's return, but unexpected guests strain relations in the Langston family to the breaking point. Meanwhile, Bellamy continues to research the history of the mysterious bones, and Rachael receives unsettling news about her baby.

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.

Bellamy looks for help from a surprising source. Another disappearance results in a quest for answers.

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.

Jacob and Margaret go missing during a violent storm that knocks out the power; another visitor arrives.

Preacher James returns, bringing a strange energy to the town; detained at the government facility, Margaret tries to keep to herself; something terrible happens to Henry.

Preacher James and his congregation head to the Langston house to stop the birth of Rachael's baby.

Bellamy ends up waking up alone on the outskirts of Arcadia, unable to remember the events of the last seven days.

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

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.

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.