Nikolai Radev invaded the lives of his extortion victims and terrorized them until they met his demands. Children, wives, family members were dragged into his world of violence and horror. No one was safe.

Stan 'The Man' Smith was a feared enforcer for Sydney's underworld. George Freeman's right hand man; he was a cold-hearted assassin, drug trafficker and murderer, turned man of God.

Brutal killer, armed robber, heartbreaker and prison escapologist, Ray Denning was the ultimate anti-hero who spent his whole life running from the nightmares in his head.

Tilly Devine was a drug dealing brothel madam, a criminal sociopath and Sydney's Queen of vice, who clawed her way to the top of the city's sex trade with a razor in her hand. She was a prostitute who founded a criminal empire.

Criminal lunatic, gunman, arch-thief and armed robber, Jockey Smith terrorized Australia at gunpoint for three decades. When confronted, the short angry guy with a bad case of small man syndrome invariably reached for a gun.

Murderer, drug dealer, kidnapper, extortionist and street hoon, Dino Dibra grew up in Sunshine, a working class suburb where he became friends with a group of boys who would all go on to make their marks in Melbourne's underworld.

Murderer, extortionist, pimp, child killer and violent thug, Regan is arguably the most violent and terrifying person in Australian criminal history. A psychopath, Regan spent his childhood torturing animals before graduating to people.

Murderer, standover man, race fixer, and crime lord, George Freeman was the King of Sydney for over three decades. His skills as a gambler and race fixer meant he could enrich his associates who would keep him out of trouble with police.