21:00Christmas with the DetectivesEpisode 3: The Necklace of PearlsBBC Radio 4 Extra Duration: 15 minutes Thu 15th Dec 2011, 21:00 on BBC Radio 4 Extra4 Extra Debut. In Dorothy L Sayers' seasonal whodunnit, Lord Peter Wimsey investigates a theft at a country house party. Read by Tom Conti.GenresDramaCrimeSeriesChristmas with the Detectives Source: BBC Online