Was entirely shot in the East End of London, mostly on original locations and mostly at night.
Many of the characters names are based on real suspects and victims of the original Jack the Ripper case.
Although not as exaggerated in the show, Rupert Penry-Jones says he is "more comfortable if things are neat and tidy" - like his on-screen character.
During Season 1, real offal was used for the 'gore' on the murdered prostitutes and would develop quite a stench. In Season 2 onwards, prosthetics and make up were used instead.