Molly and Stephanie were best friends and colleagues – before a major fall-out ends up in a fatal stabbing. Betty's sexual friendship with a woman leads to murder.

Investigating the motives and modus operandi of female murderers, who unlike men, often have complex, long-term reasons to kill.

A highway patrol officer takes her dangerous temper out on her husband; a protective mother becomes overwhelmed with jealousy over her son's new girlfriend; an unhappy housewife recruits her children's aid to kill her husband.

An aspiring Olympic equestrian's dream turns deadly when a financial crisis leads her to kill husband. A gruesome discovery in a toolbox near her home raises suspicion.

A high school teacher stages her husband's murder to cash in on his life insurance; a woman takes measures to eliminate her lover's wife and child; a serial monogamist grows tired of her fourth husband.

Investigating the motives and modus operandi of female murderers, who unlike men, often have complex, long-term reasons to kill.

Linda is greedy for her inheritance and arranges the death her of mother and step-father. When Ben marries Opal, family tensions result in a deadly stand-off.

When Susan learns about her husband's life insurance, she decides to kill him. A nurse convinces residents to make her the beneficiary of their wills, and then kills them.

Investigating the motives and modus operandi of female murderers, who unlike men, often have complex, long-term reasons to kill.

Darcy Matlock starts an office affair, with deadly consequences. Vegas Bray isn't willing to share her new man with anyone and irrational jealousy ends in murder.

A warped young woman celebrates her husband's birthday with a thrill kill; a newlywed reveals her violent side; a young woman seeks revenge after her lover is convicted of a crime.

Exploring the psyche of female killers. A grandma resents a new family member; a business woman cooks more than the books; and a divorcee tries to bury her past.

Exploring the psyche of female killers. These older women use their feminine wiles to get the attention of younger men, then break them down and move in for the kill.