In May 1978 a parcel was found in a Chicago car park. Someone did the decent thing and sent it back to the name on the return address. When a university police officer opened it, it exploded.
Over the next seventeen years the man who built that bomb killed three people and injured twenty-three more. He posted or left his devices at universities and airlines, in computer shops and family kitchens, and chose his targets from library books. The FBI called the case UNABOM. It became the longest and most expensive manhunt in the Bureau's history, and it still couldn't find him.
He was a former Berkeley mathematics professor living in a cabin with no electricity in the Montana mountains. In the end he wasn't caught by forensics or by profilers. He was caught because his brother read a newspaper and recognised the voice.
Return to Sender tells the true story of Ted Kaczynski, and it keeps to the facts. It covers:
It draws on court records, the investigators' own accounts and Kaczynski's decoded journals. It separates what is known from what has been invented or dramatised, and it never forgets the people he harmed.
A new screen dramatisation is bringing the story back. Here is what really happened.