03:15The Medical DetectivesEpisode 1: Death in the ParishBBC Radio 4 Extra Duration: 45 minutes Sun 20th May 2012, 03:15 on BBC Radio 4 ExtraWhen a cholera epidemic strikes London in 1854, the brilliant but mercurial Dr John Snow investigates. Starring Bill Nighy.GenresDramaCrimeDramaMedicalSeriesThe Medical Detectives Source: BBC Online