A deadly airborne virus finds its way into the USA and starts killing off people at an epidemic rate. Col. Sam Daniels' job is to stop the virus spreading from a small town, which must be quarantined, and to prevent an over reaction by the White House.

Season one takes you inside the O.J. Simpson trial with a riveting look at the legal teams battling to convict or acquit the football legend of double homicide. Based on the book The Run of His Life: The People v. O.J. Simpson by Jeffrey Toobin, it explores the chaotic behind-the-scenes dealings and maneuvering on both sides of the court, and how a combination of prosecution overconfidence, defense shrewdness, and the LAPD's history with the city's African-American community gave a jury what it needed: reasonable doubt.