04:00Christmas with the DetectivesEpisode 1: The Blue CarbuncleBBC Radio 4 Extra Duration: 15 minutes Wed 14th Dec 2011, 04:00 on BBC Radio 4 Extra4 Extra Debut. In Sir Arthur Conan Doyle's seasonal whodunnit, Sherlock Holmes investigates the theft of a diamond. Read by Tom Conti.GenresDramaCrimeSeriesChristmas with the Detectives Source: BBC Online