Season 1

Ian Stewart murdered his partner, children's author Helen Bailey, in 2016. He dumped her and her dog in a septic tank at her Hertfordshire home, but reported her missing and produced a note claiming she had gone to stay at a holiday home.

Philip Glenister delves into the story that unfolded in the aftermath of mother-of-four Saima Khan's murder in her Luton home.

The manhunt spanned three countries when Geoff Seggie was murdered in his Derbyshire home. His killer eventually made contact, but he never revealed his motive.

Philip Glenister explores the aftermath of Bei Carter's murder in Bridlington. The investigation hinged on the public's sightings after her killer vanished.

Alarm bells ring for detectives when the hunt for Peter Fasoli's murderer leads them to a second body in Italy. Suddenly, the search is on for a serial killer.

Police thought Manchester mum Sian Roberts's murder was a cut-and-dried case when they got a frantic 999 call from her ex. However, they could not have been more wrong.

Police are at a loss when a 79-year-old is killed in her Hartlepool home. But when the evidence mounts and the killer's movements are tracked, the net closes in.

A look into the 2007 murder of farmer's wife Kate Prout in Gloucestershire. Having failed to find her body, police wondered if the truth would ever be revealed.