It was the last night of the Route 91 Harvest Festival and people were eager to see country star Jason Aldean take the stage. Twenty-five minutes into his performance, he stepped up to the mike ... only to make a run for it off the stage. Soon, everyone else in the audience would be running for cover as well.

It was one of the most respected ships on the sea, a luxurious way to travel from Canada to Europe. But one foggy night was all it would take to send the Empress of Ireland to the bottom of the St. Lawrence River in a mere fourteen minutes.

Would the United States and the Soviet Union nuke each other out of existence? In the 1980s, no one could be sure. So in 1982, a little girl named Samantha Smith just went ahead and asked -- the leader of the Soviet Union, that is.

In this final episode of our Chernobyl series, we look at how Pripyat has fared in the years since it was evacuated, among other things.

In the penultimate episode of our Chernobyl series, we look at the investigation into the causes of the accident and the failures behind the scenes which led to the disaster.

The break is over and it's back to Chernobyl, where everything is covered with radioactive dust and the remains of reactor #4 are a continuing danger to everyone - both in the immediate vicinity, and quite possibly to all of those in western Europe.

In this part of our Chernobyl series, we reach the moment of truth - the day when all of Chernobyl's underlying problems rose to the surface and led to the worst nuclear power disaster in history.

In this episode, we see Chernobyl's beginnings, and just where cracks begin to form underneath the surface.

Before we get into the story of Chernobyl, we explore a few previous nuclear disasters, learn how radiation and nuclear accidents are measured, and find out just how sick ionizing radiation will make you.

It's St. Valentine's Day weekend, and love is in the air. Young people throughout northern Dublin flocked to the Stardust in 1981, drawn by the promise of a disco dancing competition to start at one in the morning. But within an hour of people gathering around the dance floor to start the contest, all eight hundred people in the Stardust would be fighting for their lives against a deadly inferno.