Murder UK

Nurse Marie Isotone maintained that her husband had died of natural causes while under her care. However, an autopsy uncovered a fatal dose of insulin in his system. The investigation concluded that she employed her medical knowledge to deliberately administer the drug and cause his death.

The Deadly Injection is a programme presented as an episode, falling squarely within the episode genre. It is a self‑contained instalment that tells a single, focused story rather than a multi‑part series. The central narrative follows nurse Marie Isotone, who maintains that her husband died of natural causes while under her supervision. However, when a post‑mortem examination is carried out, it uncovers a fatal dose of insulin in his system, contradicting her account of a peaceful passing. The autopsy’s discovery of lethal insulin points directly to Marie’s professional expertise being weaponised. By administering a substance she knows well, she was able to orchestrate a covert killing that initially appeared to be a natural death. The medical evidence therefore transforms a seemingly ordinary loss into a calculated homicide. The episode’s unfolding hinges on the stark contrast between Marie’s claim of innocence and the forensic proof of murder. It illustrates how her nursing background provided both the means and the opportunity to commit the crime, and how the subsequent investigation brought the hidden truth to light.