The series begins by examining the case of Allitt, a nurse on the children's ward of a hospital in Lincolnshire. She poisoned a string of young patients under her care over the course of 59 days in 1991, murdering four.

Benjamin Geen worked as a nurse at Horton General Hospital in Banbury, Oxfordshire. In 2006 he was tried and convicted of murdering two patients and causing GBH to 15 others but has always maintained his innocence.

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Italian nurse and ward joker Daniela Poggiali was present at over 90 deaths in just two years. The same time deaths were happening a string of petty thefts were also taking place. The thefts cause suspicious fellow health workers to call in the police. To add even more intrigue to the larger than life nurse, photos of her posing with dead bodies were found on her phone. The patients that had died she said were "irritating."

The chilling story of German nurse Stephan Letter, who was tried for the murders of 29 patients at a clinic in the Bavarian town of Sonthofen.

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Real crime. Chilling series looking at nurses who kill their patients. Niels H administered lethal doses of drugs to patients in order to later 'show off' his resuscitation skills.

Real crime. Chilling series looking at nurses who kill their patients. Colin Norris targeted elderly patients by administering them unnecessary doses of insulin.

The case of Filipino nurse Victorino Chua, who secured a job at Stepping Hill Hospital, Manchester, and began to inject insulin into saline bags of 44-year-old Tracy Warden and 83-year-old Alfred Weaver.

Charles Cullen was a nurse that is believed to have killed over 300 patients. Experts analyse the actions and motive of this insidious serial killer.