Derek Abbott has spent decades trying to identify the man found dead on Somerton Beach. If his theory is correct, he's married to the unknown man's great granddaughter. But to prove it, he needs the Somerton Man's DNA.

The man who died on Somerton Beach in 1948 went to great lengths to disguise his identity. But he couldn't hide the clues on his body — his peculiar ears, teeth and calves. His DNA. Modern science sheds new light on this decades-old mystery.

A torn piece of paper from a book of Persian poetry leads to the discovery of an elusive young nurse. What was her relationship to the dead man on Somerton Beach? Does she hold the key to cracking the case?

In post-war Adelaide, there's a feeling of optimism and relief in the air, but it's mixed with paranoia about the changing world order. And in this mix, on a summer day on Somerton Beach, a man's body is discovered.

Union membership is a fraction of what it was but people power is finding a voice through new platforms and movements.

The different power players in each state. All six states are led by Premiers and have cabinets — they're the same. But they're also different. In part three, we look at the industries, groups and people who have power in each state, including mining peak bodies, radio shock-jocks, the AFL and poker machine operators.