Chandler and his team set out to find supplies and materials for Dr. Scott’s lab, only to tangle with bounty hunters and the Immunes. Meanwhile, Rachel’s effort to find a spreadable cure depends on the scientist who nearly erased mankind.
With a potential cure in their grasp, Dr. Scott asks for human volunteer’s to test her formula that was successful on a monkey. However, will this be the answer she is looking for, or will it put the volunteers’ lives in jeopardy?
Chandler and his fractured team join forces with an undergeound resistance in an attempt to defeat Amy Granderson; Rachael tries to help the sick while remaining a prisoner; Sidney and the crew try to regain control of their ship.