06:00Sherlock HolmesHis Last BowEpisode 4: The Bruce Partington PlansBBC Radio 4 Extra Duration: 45 minutes Wed 7th Dec 2011, 06:00 on BBC Radio 4 ExtraWith national security at stake, the sleuth's brother Mycroft heads to Baker Street. Stars Clive Merrison and Michael Williams.GenresDramaCrimeBrandSherlock HolmesSeriesSherlock Holmes: His Last Bow Source: BBC Online