In 1995, new FBI profiler Jim Fitzgerald is asked to join the task force charged with identifying and arresting the terrorist known as the Unabomber.
In 1995, Fitz must determine if the Unabomber's threat to blow up a jet is credible. Years later, the two meet face-to-face.
In 1995, a new linguist helps Fitz and his team in their search for clues. In 1997, Ted and Fitz debate their legacies.
The Unabomber insists that he will halt bombing if his manifesto is published, a decision that ultimately lies with Attorney General Janet Reno.
David Kaczynski receives some good news about the FBI's investigation into his brother but things take a turn when Fitz pays David a visit.
In a letter to his brother, Ted recounts an important figure from his childhood and delves into how his inability to form relationships haunts him.
Fitz and his team must find enough evidence to secure a warrant for Ted's arrest before a reporter shares news of the FBI's investigation.
When Ted fails to have evidence against him thrown out, Fitz makes one last effort to convince Ted to plead guilty.