The Melbourne gangland wars start the night the gangster Alphonse Gangitano, "The Black Prince of Lygon Street", and one of the legendary Carlton Crew gang, murders a low-life crim named Greg Workman at a St Kilda party for the sheer hell of it. The charming gangster Alphonse gets away with the murder by convincing two witnesses not to testify but the killing sets the tone for the mayhem that will follow, and sets Alphonse himself on a path to self-destruction.

Convinced that Jason Moran was also involved in the nightclub assault, Steve Owens tricks Jason's driver Carl Williams into revealing that he did indeed ferry Jason to and from the scene. Carl Williams takes the first steps towards building his own empire. The police are determined to crack the "Carlton Crew" crime gang.

Carl Williams begins his deadly revenge on the crime-controlling Carlton Crew, and tries to increase his ever-expanding grip over the Melbourne crime world; whilst Jason Moran is in jail, his brother Mark takes control of the family business; Detective Steve Owen is determined to prove an underworld murder.

Amid growing public unrest, the police establish Task Force Purana to combat the gangland war. Loan shark Mario Condello faces his own financial crisis, which he solves with brutal efficiency. Bitter rivals Carl Williams and Jason Moran take out contracts on each other’s life. Taskforce Purana detectives are furious when police corruption derails their investigations.

Carl uses his high media profile to accuse Detective Steve Owen of corruption; Graham "Munster" Kinniburgh is gunned down and Mick Gatto tries to convince Carl Williams to end the gangland war; "Benji" Veniamin agrees to kill his former mentor Mick Gatto, but it's Gatto who lives to tell the tale; Carl and Roberta are rocked by the death of their closest friend.

Detective Steve Owen finally gets enough evidence to arrest Carl Williams for murder. After nine years the gangland war is over.

In the mid 1970s, Kiwi charmer Terry Clark and "Aussie" Bob Trimbole form a deadly alliance that will change the face of Australian crime forever.

Anti-drugs campaigner Donald Mackay makes deadly enemies with the Griffith mafia and corrupt NSW police. Melbourne crim Ray Chuck plans Australia's most audacious heist - the Great Bookie Robbery.

Australia's most dangerous hitman, Chris "Mr Rent-a-Kill" Flannery, moves to Sydney to build his deadly reputation. Terry Clark's UK murder trial reaches a sensational climax, but can Allison testify against her former lover? Meanwhile, Aussie Bob gets involved in arms smuggling for the IRA.

In the series finale of Underbelly, Chris "Mr Rent-a-Kill" Flannery becomes a victim of his own success. But who would dare order a hit on Australia's most dangerous hit man?

Corrupt cop Dennis Kelly tries to further his career by joining the National Crime Authority. With her career in tatters, whistleblower Debbie Webb makes a fateful decision to join the fraud squad. Fed-up with prostitution, Kim Hollingsworth considers her career options.

John Ibrahim is under pressure following a spate of gang violence on the Golden Mile. Debbie Webb finds a powerful ally in her fight against police corruption. Kim Hollingsworth tests the loyalty of her new boyfriend with a sexy challenge. Dennis Kelly uses all his cunning to turn a corruption allegation into a career opportunity.

Corrupt cop Dennis Kelly betrays his best mate to the Royal Commission, with tragic results. Gerry Lloyd makes a deadly deal with drug boss Shaka to expose corruption on the Golden Mile. Kim risks her life by going undercover for the Royal Commission. When the operation ends, she receives a shocking reward.

The true story of glamorous crime queens Tilly Devine and Kate Leigh, and their deadly battle to control Sydney's underworld in the 1920s.

The true story of glamorous crime queens Tilly Devine and Kate Leigh, and their deadly battle to control Sydney's underworld in the 1920s.

The police have a major breakthrough on locating Anthony Perish after Frank agrees to go undercover. Perish arranges a chilling summit meeting with a bikie boss, and one of Perish's henchmen gets a lesson in obedience.

When Strikeforce Tuno is disbanded, Gary devises a new strategy to solve the Falconer murder. The police finally track down Anthony Perish and arrest him, but Rooster proves more elusive than ever. Pam is stretched to breaking point with Gary.

After being released from prison a broken man, Squizzy vows to turn over a new leaf. Squizzy's attempt to go straight is short lived when he goes into the cocaine business with his former enemy Long Harry.