When Chris Regan started dating coworker Kelly Cochran, he knew she was married. But he had no idea of the deadly wedding day pact she had made with husband Jason. Chris had become entangled in a love triangle that would see not one, but two people lose their lives.

Amin Miah wanted a devout, homely wife to start a family with. Mahmuda Khatun wanted a career, a social life—and her family off her back. It was not the recipe for a happy marriage. Their differences irreconcilable, one of them would choose the violent way out.

Childhood sweethearts Lisa and Thomas Infante quickly grew apart, but their marriage continued to struggle on until Lisa made the fatal decision to leave.

The story of a man who murdered his first wife and staged a car crash, attempting to do the same to his second wife - all for life insurance money.

To others, Stephen Searle was a politician, veteran and pub landlord. To his wife Anne, he was a violent abuser. Only her death would expose his true nature.

When a bizarre, live-in arrangement between a married couple and their mistress goes south, a wife takes revenge by masterminding a twisted murder plot.

The chilling story of midwife and mother-of-four Hannegret Donnelly, who battered her husband to death with a rolling pin.

A look at the twisted case of a former airline pilot, who murdered his wife by deliberately crashing their car into a tree after disabling her airbag.

The murder of American politician Kathy Augustine, who died after being given a paralysing drug by her husband Chaz Higgs, a professional nurse.

The story of Denise Williams, who conspired with her lover to murder her husband, cover it up and collect the insurance money.

Unable to reconcile differences with his wife, paramedic Paul Novak tries to plan the perfect crime. In December 2013, firefighters responded to calls that Catherine Novak's house was burning down in the early hours of the morning.

The story of double-murderer Janbaz Tarin, who killed his ex-partner and her mother when they discovered he had a secret wife and children.

Kelly and George Worgan appear to be the perfect parents, but their marriage ends in murder. After strangling his wife, George left a note for his children which read `Daddy loves you.'

The story of a woman who teamed up with her lover to murder her husband, in the hope that they could both cash in on a hefty life insurance policy.

Chacey Poynter played the grieving wife when her veteran fire captain husband was shot to death. But investigators soon began to spot holes in her story.

Nat Fraser hits headlines when the evidence against him means he is jailed for the murder of his wife Arlene, despite no trace of her body ever being found.

Brian Burns claimed it was an accident, but the overwhelming evidence against him proved that Brian Burns killed his wife in a savage attack before trying to cover up the murder.

Lois Riess fatally shot her husband and went on the run to evade justice. But her determination to escape her gruesome past left another innocent victim dead.

The shocking story of a husband who opened fire on his estranged wife while sitting in a car outside their children's school.

The story of the vicious murder of Aliny Godinho, whose ex-husband Ricardo stabbed her to death as her three-year-old daughter watched on.

The story of a man who brutally shot his pregnant ex-wife with a crossbow, in a premeditated attack he plotted for three years prior.

When Frances Araiza met Bill Hall Jr, he was a 16-year-old with big dreams. Three decades later, they are grandparents with a multi-million empire. However, behind closed doors their marriage is heading for an explosive end.

After leaving an arranged marriage she claimed was abusive, Faria Khan could have moved on. But she wouldn't be satisfied until estranged husband Nawajid was dead. And she knew exactly who to ask to help.

Steven and Crystal McDowell were never a good match, but years after they split up, Steven kept telling himself that a reconciliation was near. Until Crystal suddenly disappeared during a deadly hurricane.

Glyn Dix met his second wife Hazel in prison while serving a sentence for murder. After his release, Dix could not resist his urge to kill again and chopped his wife's body into 16 pieces.