A new documentary about one of Britain’s most disturbing and debated criminal cases is arriving on Netflix. The Investigation of Lucy Letby, a feature-length film, will be available for streaming globally on Wednesday, February 4, 2026. The documentary promises a deep look at the case of the former neonatal nurse, using never-before-seen police footage and interviews with people on all sides of the story.
The film focuses on Lucy Letby, who was found guilty and is serving life in prison for the murders of seven babies and the attempted murders of seven others at the Countess of Chester Hospital between 2015 and 2016. Her trial and conviction divided public opinion, and this documentary aims to present different viewpoints from the police, legal experts, and, for the first time, a family member of a victim.
What The Investigation of Lucy Letby Documentary Will Show
The documentary is a 90-minute film produced by ITN Productions for Netflix. Its main goal is to give what filmmakers call “the most comprehensive look” at this complex case by including voices from all sides.
A key part of the film is exclusive access to police evidence. Viewers will see never-before-seen footage from Letby’s arrest and her questioning by police. The released trailer shows moments like police arriving at her home and Letby, wearing a dressing gown, being led to a police car while telling her parents “don’t look”. It also includes clips from her police interviews where she says, “It was all just spiralling out of control”.
For the first time in any documentary, the mother of one of the babies will share her experience and involvement in the trial. Her interview is presented anonymously. The film also includes interviews with the senior detectives from Cheshire Police who handled the investigation, describing it as a “once-in-a-generation type case”.
The documentary does not just present the prosecution’s side. It also includes interviews with experts and lawyers who have raised questions about the evidence that led to Letby’s conviction. This includes contributions from Letby’s barrister and from medical experts who have since said they believe the evidence was misinterpreted.
Understanding the Lucy Letby Case and Its Controversy
To understand why this documentary is being made, it is important to know the basic facts of the case and why it continues to create debate. Lucy Letby was a nurse working in the neonatal unit of the Countess of Chester Hospital.
Between June 2015 and June 2016, there was a rise in unexpected deaths and sudden collapses of babies in the unit. Letby was the only staff member present for all the incidents, which led to an investigation. In November 2020, she was charged with multiple counts of murder and attempted murder.
After a long trial, she was found guilty in August 2023 of murdering seven infants and attempting to murder seven others. The judge gave her a whole life order, meaning she will never be released from prison. In July 2024, she was found guilty again in a retrial for one additional count of attempted murder.
Despite the guilty verdicts, the case has remained controversial. After the trial, some medical experts publicly expressed doubts. A panel of international specialists reviewed the case files and argued that no murders had taken place. One expert, Dr. Shoo Lee, whose research on air embolisms was used by the prosecution, later said his work was misinterpreted and has stated he believes in Letby’s innocence.
The public debate grew so much that the BBC’s Panorama program aired multiple documentaries exploring the unanswered questions, with one titled “Lucy Letby: Who to Believe?”. The new Netflix film enters a landscape where public opinion is split, and many people are still asking questions about what really happened.
Exclusive Content and Documentary Creators
The filmmakers at ITN Productions secured unusual access to tell this story. They spent years building relationships to get contributions from people directly involved. The director, Dominic Sivyer, said the project was “exceptional and demanding” and came with significant “creative and ethical responsibility”.
The executive producers, Caroline Short and Ian Rumsey, have both spoken about the care taken in presenting the story. Caroline Short said, “The access to all our contributors came with a huge responsibility to present everyone’s perspectives with care and understanding”. Ian Rumsey added that the team aimed to let viewers “draw their own conclusions” by showing all sides.
The documentary is structured to follow the case chronologically, from Letby’s arrests through to the trial, using only testimonies from those directly involved. This approach is intended to provide a clear but complete timeline of events as seen by different people.
Recent updates in the case are also relevant. In late January 2026, it was confirmed that Letby will face no further charges. Police had investigated additional baby deaths and collapses but prosecutors decided not to pursue more charges. Additionally, a major public inquiry led by Lady Justice Thirlwall into how the crimes were able to happen is due to publish its report later in 2026.
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How and Where to Watch The Investigation of Lucy Letby
The documentary will be released globally on the Netflix streaming platform. It will be available starting February 4, 2026. Viewers in the United States, United Kingdom, Canada, Australia, India, and all other countries where Netflix operates will be able to watch it at the same time.
On Netflix, the film is listed with a PG13 rating and is categorized as a documentary. The runtime is approximately 90 minutes. People can watch it on any device that supports the Netflix app, including smart TVs, phones, tablets, and computers.
The official trailer is already available to view on Netflix’s YouTube channel and through the Netflix platform itself. The trailer gives a first look at the arrest footage and the emotional weight of the interviews.
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