Medics and carers hold the lives of their patients in the balance. They see us at our most vulnerable, and we trust them utterly. Yet there are those who abuse this trust in the medical profession, and they take advantage of their position to commit the most hideous crimes. Some kill because of a twisted sense of mercy. Others let their monstrous egos take over as they seek to become heroes by rescuing those they harmed themselves. And then there are the men and women who simply delight in the power of life and death. Whatever their motivation, these killers can go undetected for years, racking up huge body counts before they are finally discovered.

Mary Ann Cotton --Thomas Neill Cream -- H. H. Holmes -- Amelia Dyer -- Jane Toppan -- Belle Gunness -- Jeanne Weber -- Martha Rendell -- Henry Clark and Augusta Fulham -- Amy Archer-Gilligan -- Marie Alexandrine Becker -- Anna Marie Hahn -- Josef Mengele -- Marcel Pétiot -- Nannie Doss -- John Bodkin Adams -- Lila and William Young -- Marie Hilley -- Genene Jones -- Donald Harvey -- Gwendolyn Graham and Catherine Wood -- Richard Angelo -- The Lainz angels of death : Maria Gruber, Irene Leidolf, Stephanija Mayer and Waltraud -- Beverley Allitt -- Dorothea Puente -- Waneta Hoyt -- Harold Shipman -- Michael Swango -- Kristen Gilbert -- Kathleen Folbigg -- Charles Cullen -- Kimberley Clark Saenz -- Victorino Chua -- Niels Högel -- Elizabeth Wettlaufer.