At precisely 1.23am on 26 April 1986, the world changed forever. In Pripyat, Ukraine in the Soviet Union, the largest nuclear reactor of its kind exploded at the Chernobyl Power Station.

This episode covers the final hour leading up to the Columbine High Massacre.

Zero Hour: The Last Hour of Flight 11 dramatically recounts the final sixty minutes of American Airlines Flight 11—an hour, and a flight, that changes the world forever. At 08:46 on the morning of September 11, 2001, Flight 11, a fully fueled Boeing 767, explodes into the North Tower of the World Trade Center in New York City. It is the first terrorist strike on that day of infamy.

During a rush-hour morning, Tokyo's elaborate underground Metro system is packed with commuters. They are unaware that it is about to become ground zero for an attempted mass murder. This program reconstructs minute by minute events from 7.46am to 8.46am as five men set out to poison the Tokyo Metro system. It offers personal testimonies of individuals caught up in events beyond their control.

A compelling program detailing the minutes leading up to the horrifying event that changed the way Australians think of our favourite holiday destination. Based on first hand witness accounts, official documents and actual footage of events. Including interviews with survivors and re-enactments of what happened in the nightclubs.

On April 19, 1995, the Alfred P Murrah federal building in downtown Oklahoma City became the site for the most deadly peacetime attack on United States soil to date. As hundreds of employees prepared for the day ahead, a truck parked outside the front of the nine storey building. It then exploded.

On September 27, 1994, the ferry 'Estonia' departed from the capital of Tallin with 989 people on board heading for Stockholm. It never arrived.

On December 2, 1993 Pablo Escobar, a Columbian drug lord, and his assistant, were captured and killed at Escobar's home.

Eight months after the fall of Baghdad, Saddam Hussein is still at large. This is the tense countdown to the capture of Iraq's fugitive dictator.