Kathleen Folbigg experienced unimaginable loss. All four of her infant children died suddenly, over a 10-year period. Their deaths were unexplained. Until a police detective turned up at her door, and arrested Kathleen on suspicion of murder. She was labelled ‘Australia's worst female serial killer', convicted, and was destined to spend most of the rest of her life in jail. Until a different type of detective entered her life. A scientist working in a lab who uncovered the truth behind the deaths. This is the story of a shocking miscarriage of justice, but as journalist Rachel Sylvester starts to investigate how this happened, she learns that Kathleen is not alone – other mothers have endured the same fate, and may also be in prison. The Lab Detective is a story about the power of science, and the determination of those searching for the truth.

Journalist Rachel Sylvester investigates the case of 'Australia's worst serial killer'. And discovers, in a story about mothers who have been accused of murdering their own children, there is one man who connects them all: a doctor called Roy Meadow. Our thanks to The Francis Crick Institute for sharing recordings and insights.

Kathleen Folbigg is just trying to survive. She's a grieving mother, sentenced to life in jail for killing her four infant children. That is, until a small group of people start to question whether she might be the victim of a terrible miscarriage of justice. Our thanks to The Francis Crick Institute for sharing recordings and insights.