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.

When deceased loved ones begin to reappear, the people in Arcadia change forever.

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.

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.

Bellamy and Sheriff Fred try to find Caleb; Maggie gives Jacob a checkup; Pastor Tom's old love returns.

Bellamy tries to keep Jacob safe but his past interferes; Elaine must find where Caleb hid the money; Rachael gets shocking news.

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.

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

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.

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

Exhuming Jacob's grave deepens the mystery of his return; Henry struggles to accept that Jacob is really the son he lost; Maggie and Bellamy wonder if the local river holds a clue that could connect Caleb's and Jacob's deaths.

Bellamy wants to have Jacob's tomb exhumed; Pastor Tom reaches out to a childhood friend; Caleb claims he can't remember his death.

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.

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.