20:00Sherlock HolmesThe Return of Sherlock Holmes - Series 2Episode 6: The Second StainBBC Radio 7 Duration: 45 minutes Thu 1st Dec 2011, 20:00 on BBC Radio 4 ExtraThe Prime Minister asks the sleuth to recover a letter vital to national security. Stars Clive Merrison and Michael Williams.GenresDramaCrimeBrandSherlock HolmesSeriesSherlock Holmes: The Return of Sherlock Holmes - Series 2 Source: BBC Online