Watch TV Series Black Widow Murders Oxygen Online Free. Black Widow Murders features unique stories of diabolical women who turn society’s assumptions about the “fairer sex” upside down – luring their victims into gruesome deaths for wealth, lust or power. Whether it’s a career con artist, serial divorcee or homemaker leading a secret double life, these cases offer seductive power fantasies where women take control in the most violent way imaginable. They won’t stop until investigators finally bring them to justice.