When the elusive Unabomber threatens to blow up a jetliner, Fitz must determine if the threat is real. In 1997, Fitz confronts Ted for the first time.

Fitz receives linguistic proof that Ted is the Unabomber. He tracks down Ted's brother David, who is astonished at the accuracy of Fitz's profile.

When Ted fails to have the evidence against him invalidated, Fitz makes one last appeal to him to plead guilty.