The Investigation of Lucy Letby | Preview (Netflix)

The feature-length film about Lucy Letby, the British neonatal nurse who was found guilty of murdering seven babies and attempting to murder seven others under her care, hears for the first time from the British police who investigated the case and features never-before-seen footage of Letby during her arrests and police questioning.

The documentary examines the case of Letby the neonatal nurse convicted of unimaginable crimes - the murder of 7 babies and attempted murder of 7 more. Her trial gripped Britain, and her conviction has divided opinion.

The film includes never-before-seen footage and unparalleled and exclusive access to those central to the story: the detectives who built the case, a family seeking answers, the hospital consultants who initially raised the alarm, and lawyers and medical experts who question the evidence, providing a comprehensive look at one of Britain's most notorious crimes. 

The documentary includes interviews with experts and lawyers on both sides.

It also includes an anonymised interview with a mother of one of the victims who speaks for the first time about her experience and involvement in Letby’s trial.  

This group of contributors from both sides make The Investigation of Lucy Letby the most comprehensive look at one of Britain's most notorious crimes.

Produced as a result of years of research and relationship-building, the film traces developments from Letby’s arrests to trial chronologically only using testimonies from contributors from both sides who have been directly involved in or affected by the case.

Ian Rumsey, Managing Director of Content, ITN, said: “This was an incredibly challenging story to tell. We've presented perspectives from all sides in order to let viewers draw their own conclusions. I'm enormously proud of the entire team, who've attempted to make the definitive documentary about this tragic case. It is ITN Productions at its best."

Caroline Short, Head of Global TV, ITN Productions, said: “The access to all our contributors came with a huge responsibility to present everyone's perspectives with care and understanding. We are grateful to all those people who trusted us to tell their story.”

Dominic Sivyer, director of The Investigation of Lucy Letby, said: “This was an exceptional and demanding project, marked by significant creative and ethical responsibility. Our aim was to craft a powerful, emotionally resonant depiction of the events surrounding the case.”

The Investigation of Lucy Letby, will launch globally on Netflix on Wednesday February 4th, 2026.