A wealthy inventor arrives at Grey Sloan and asks Koracick for help. Meredith struggles to save a woman with diabetes who has been rationing her insulin. Jo and Link fight to save a young man who fell onto train tracks.
Philip and Elizabeth deploy a plan for the CIA's Mujahideen visitors; tensions at the Jennings' home escalate.
Philip and Elizabeth's home and work lives collide in new and dangerous ways; Nina struggles to figure out her next steps.
A shocking new development in Wiliam's work leads the Jennings to face the dangerous realities of a biological war.
Philip and Elizabeth deal with the consequences of their actions while trying to complete a dangerous, new bio-weapons assignment.