Arcadia is suddenly in the epidemic

With the help of Bellamy and Sheriff Fred, Tom leads the charge in the search for Rachael, but her situation becomes increasingly dire as her captors grow more desperate. Maggie and Dr. Ward continue their medical research on the resurrected subjects and a series of shocking discoveries sets them on the brink of a game changing find, however, their focus shifts when Arcadia is suddenly in the throes of an epidemic.