Molly discovers Ethan is alive and sets out to get her son back. Also, suspicions about John’s death cause JD to investigate Julie’s potential involvement.

As Molly succumbs to the virus, long forgotten memories surface. Also, Julie is confronted with hard choices and the Hybrids seek revenge.

Following a near-death experience, Molly has a harrowing vision she can’t shake. Also, Shepherd's loyalty to the Global Space Commission is called into question.

Molly, JD and Ethan track down John’s mysterious former colleague who may hold the key to stopping the Humanich threat. Also, Julie enlists Charlie on a mission to find out where Lucy’s orders are coming.

Molly reveals disturbing new details about Shepherd’s death to the GSC, and Lucy makes a powerful move against the humans and hybrids that could have devastating global repercussions.

Molly and JD frantically race to the hybrids to stop a Humanich plot that will destroy the human race. Also, Lucy has a shocking realization about the GSC that forces her to question her allegiance and put Ethan at risk.