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

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

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.

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,

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