It's about "Murder Maps", a documentary telling the stories about real murders that happened in London.
It mixes acted, staged scenes that retell the story, background information given by experts and real footage portraying murderer, victims or the time they lived in.
Presented is the whole thing by Nicholas Day, whose british accent is definitely a plus.
I finished the series this day and I loved it. I'm a big fan of dark, macabre stories and if they're real it is even better. Also the whole given background information is a great thing, as it leads you to not only seeing the murder, it lets you also notice why this cruel events happened and what impact they had on society, working methods of the police, forensic science and even politics. You get an idea of the psyche of the killers and how they became what they were, for example Ruth Ellis, the last executed woman in UK, which got into a spiral of violence and jealousy leading to her killing her lover David Blakely. They give you a good insight into police work back then, like that when working on fingerprints as evidence started, it was pretty hard, because surely it wasn't digital, they had everything on paper and had to look through everything by hand. Every episode paints a picture of what was the society like when the murder happened, how it was after ww2 for example.The series also displays really good the development in the UK in police work, science, emancipation and the society in general.
So if you like documentaries and a good crime story you should give this series a chance.