Season 2 - Episode Guide

Seven-year-old Kyle Lewis loves summer, then he develops a headache and a high fever, so his parents bring him to the hospital; doctors race to find out what is wrong with Kyle in time to save him.

A few days after the death of Dr. Autumn Klein, a doctor at the hospital checks her chart and helps solve the mystery of what killed their colleague.

Patients surface with similar symptoms and doctors have to act fast if they hope to save lives.

In April of 2012, 61-year-old Mark Staudte, a father of four and local musician from Springfield, Mo., abruptly became ill. Nine months later, his 24-year-old daughter suddenly became ill and was hospitalized in critical condition.

Physicians discover a strange, genetic disease that causes progressive neurological deterioration in children.

On Sept. 29, 1982, seven unsuspecting Chicago-area residents are stricken, and then die under mysterious medical circumstances. When the actual cause of death was discovered, a task force was formed to investigate.