Every season of What The Killer Did Next ever, ranked from best to worst by thousands of votes from fans of the show. The best seasons of What The Killer Did Next!

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.

Helen Bailey

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

Saima Khan

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.

Geoff Seggie

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

Bei Carter

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.

Peter Fasoli

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.

Sian Roberts

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.

Norma Bell

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.

Kate Prout

After a teenager is murdered in her flat, police try to find her killer, starting with a set of bloodstained keys.

Megan Newton: The Opportunist Murder

The Opportunist Murder: When a woman is found dead in a hotel, police realise that an apparent suicide is not what it seems, leading to a manhunt that crosses borders.

Nadine Aubras

A woman heads off on an extended honeymoon but her out-of-character contact worries her friends, resulting in a tragic discovery.

Debbie Starbuck

An evil web of lies and deceit confronts detectives after they discover the body of grandfather Peter McMahon in a freezer.

Peter McMahon

A murder begins a tawdry tale of stolen money, an international escape attempt and an email from the supposed killer keen to sell his story.

Michael Ryan

See how police used CCTV to trace the perpetrator of a crime that shocked the nation - the murder of teacher Sabina Nessa in London.

Sabina Nessa

A student's strange disappearance becomes a murder investigation, and detectives face a tough task to prove the suspect's guilt.

Joy Morgan

The Identity Thief Killer: When a woman's body is found in a bin in Lewes, police look for the perpetrator of a disturbing crime.

Nicola Stephenson

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

The Best Seasons of What The Killer Did Next

The Best Seasons of What The Killer Did Next

Season 1

Season 2