On a crisp autumn morning at Port Arthur's historic convict settlement, a gunman walked into the Broad Arrow Cafe, killing 35 people. We go deep inside the experience, hearing from first hand witnesses to understand what it was like to live it.

A massive earthquake below the Indian Ocean unleashed the deadliest tsunami in recorded history, killing 230,000 people across 14 countries. Those who were swept up in the wave had no idea of its scale, only of the devastation that unfolded before their eyes.

It's a day etched into Australian sporting folklore for all the wrong reasons. A moment on a footy field where Nicky Winmar, a proud Noongar man, called out racism.

A demonstration against indefinite mandatory detention at Woomera detention centre attracted more than a thousand concerned citizens from all over the country. But the protest took an unexpected turn.

The final episode in the series takes us to the small Tasmanian mining village of Beaconsfield. When a mine collapse killed Larry Knight and trapped two others, Todd Russell and Brant Webb managed to survive.