True-crime stories have seemingly never been more popular, but our fascination with the macabre is as old as storytelling itself.
Madame Tussaud, who understood the appeal of villainy better than most, famously immortalised the murderous in wax at her Chamber of Horrors, which was recently restored to the London attraction she founded after a six-year absence.
Waxworks to have featured there include those of figures as notorious as Adolf Hitler, Charles Manson and Dr Crippen - although as the makers of the many recent true-crime TV series and podcasts have come to realise, it's not necessarily the best-known stories of depravity that are the most captivating.
Who are the Chamber of Horrors' forgotten killers?