Conrad and Cade work with a Medicare patient who sheds some light on the inner workings of the prescription fraud situation.
The return of the dead reaches critical mass, sending the town into chaos; Sheriff Fred implements his own agenda, triggering an unexpected siege.
Tom leads the search for Rachael, as her situation becomes increasingly dire; Maggie and Dr. Ward make a series of unexpected discoveries.
Bellamy awakens alone and abandoned at Arcadia's outskirts, missing a week of his life.
Desperately ill, Bellamy turns to an unexpected source and after another returned disappears, the living look for answers.