It was a normal day at the Washington Post—until an essay and a deadly threat arrived in the mailroom.

Growing up, David Kaczynski knew there was something different about his brother Ted. But how did he go from brilliant math professor to serial bomber?

Satanic Panic, some key coincidences, and one arrogant guy place a group of friends in law enforcement’s crosshairs.

David and Ted were living strikingly similar lives, until David was pulled out of his hole. Literally.

UNABOM was the longest manhunt in FBI history. Why did it take several decades, a revolving door of agents, and hundreds of suspects to find Ted?

David Kaczynski starts to accept the truth and finally reaches out to the FBI. But can agents convince their bosses that this is the guy?

The FBI descends on a small town in Montana, and the clock is ticking to catch Ted.

Decades after Ted Kaczynski was caught, we wrestle with a question that still hangs in the air: Was Ted a prophet or simply a murderer who terrorized a nation and killed three people?