Crimes That Shook the World Season 2, Episode 7: Dennis Nilsen

Arthur Shawcross

Investigating American serial killer Arthur Shawcross, who killed the majority of his victims after being paroled early following a conviction for murdering two children

Chessboard Killer

The story of Alexander Pichushkin, who aimed to kill 64 people - one for each square on a chessboard - but was caught before he could complete his task

Monster Of Florence

The unsolved case of the Monster of Florence, who preyed on young couples and committed seven murders in and around the city, but who has never been officially identified

Bodies in the Barrels

In-depth investigations into infamous criminal cases and uncovering the motives behind them and the procedures used to arrest the perpetrators

Monster of Belgium

The story of Belgian Marc Dutroux, who kidnapped, tortured and killed children, and why 300,000 people took to the streets in protest at the handling of his case

Lucie Blackman Murder

Yorkshire Ripper

In-depth investigations into infamous criminal cases and uncovering the motives behind them and the procedures used to arrest the perpetrators

Aileen Wuornos

Profile of female serial killer Aileen Wuornos, whose year-long killing spree left seven men dead, and whose story inspired the film Monster, starring Charlize Theron

Suffok Strangler

The hunt for the Suffolk Strangler, who murdered five prostitutes in the Ipswich area during 2006, leading to the largest manhunt since the Yorkshire Ripper