Outlaw motorcycle gangs are shrewd criminal business groups who generate extraordinary volumes of cash and assets.

This episode explores the intricate drug syndicates, re-birthing scams, security operations and the intimidation tactics that put bikie gang leaders amongst the wealthiest and most dangerous men in the country.

Unrelenting violence and intimidation are key ingredients to a bikie gang's constant quest for power. Tonight, the girlfriend of a murdered senior gang member talks for the first time, and the family of a murdered civilian speaks about how their son got caught up in this brutal world.

A new wave of Middle Eastern gangs with no respect for authority who come out guns and fists blazing.

The new Middle Eastern gangs across Australia are ruthless, violent and out of control.

Police say they are becoming more and more brazen as they pull out their guns first and ask questions later.

This episode takes an exclusive look inside the nastiest gang of them all, is given harrowing access to gang violence in our prison system and revisits some of the bloodiest murders to come out the conflicts.

Bank robbers have come a long way in Australia, from sledgehammers and sawn-off shotguns to technological smarts and the smash and grab technique of ram-raiders.

A seasoned bank robber explains how his debut failure led him to the "college of knowledge" for bank robbers - prison - where he learned the tricks of the trade.

It's the drug of choice of the rich, stylish, powerful and famous yet one of the first to bring it into this country was a knockabout working class bloke with a brilliant criminal mind. His name was Michael "Mikel" Hurley, whose rise from petty thief to millionaire drug baron is legendary.

Tonight we look at eastern European organized crime syndicates who have infiltrated Australia since the collapse of communism. We will explore some of the more disturbing events that have taken place and highlight the gangs' ability to flex their considerable muscle.

Tonight we explore the Calabrian mafia's tight grip on Australian enterprises and take a close look at some high-profile murders.