In a letter to his brother, Ted recounts the key events from his past that informed his decision to engage in terrorist activities.

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

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.

Fitz races to find a linguistic connection that will secure an arrest warrant while the FBI closes in on Ted's cabin in Montana.

The Unabomber will stop bombing if his Manifesto is published. Fitz pushes for publication with S.A.C. Ackerman, who presents Fitz's argument to Attorney General Janet Reno.

FBI agent Brennan realizes he needs to change course radically to catch Eric and allies with Embry to do so. In Atlanta, Kathy Scruggs comes face to face with Richard for the first time ever.

Linguist Natalie Rogers helps Fitz find clues about the Unabomber's identity in the Manifesto, but their findings face skepticism at the UTF. In 1997, Ted claims he can invalidate all of the evidence against him.

When the media gets wind of the FBI's "hero-bomber" theory, a media firestorm erupts, engulfing Richard and his family. Meanwhile, ATF agents raise doubts as bombings continue.

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.

While Richard fights back against the FBI and the media, ATF Agent Embry investigates a serial bomber terrorizing the Southeast and discovers a crucial link to the Olympic bomb.

Eric manipulates locals, militia, and FBI alike as he plans a major counterattack. Meanwhile, Richard appears on "60 Minutes" in a high-stakes gamble to save his reputation once and for all.

Eric, starving and bereft of allies, is finally captured. But as his day in court—and Richard's exoneration—approaches, he has another dangerous secret in store for law enforcement.

The FBI identifies serial bomber Eric Rudolph and gives chase, but Eric escapes into the forest. Richard and Watson discover powerful evidence that could exonerate Richard and contemplate turning to the press for help.

The FBI search for Eric spins out of control as anti-government locals and Eric's family push back. Meanwhile, Richard must confront his inner demons as he prepares for a pivotal press conference.

In 1995, FBI profiler Jim "Fitz" Fitzgerald joins the Unabom Task Force. Fitz recommends new methods of profiling but finds no allies among the agents in charge. In 1997, Fitz is tasked with confronting Ted Kaczynski, the Unabomber.

Security guard Richard Jewell saves hundreds of lives when he discovers a bomb at the 1996 Atlanta Olympics. But his heroic act quickly comes under the scrutiny of law enforcement as pressure mounts to catch the killer.

Viewing him as a freedom fighter under siege, local militias rally around Eric and attack the FBI. As Embry continues to investigate, he learns that Eric is not who he claims to be.

Risking everything, Brennan and Embry appeal to a powerful local militia leader with the truth about Eric, and a call for unity and moral courage.