1/5 The detective superintendent probes a grisly murder on a railway track.
BBC Radio 4 Extra
1/5 Dandy secret agent Lucifer Box investigates drug-related dealings in 1920s Manhattan.
1/3 Blackmail threatens the monarchy and Sherlock is about to meet the woman who beats him. (R)
2/5 As the Lucky Charm murders mount up, the detective questions the station busker.
2/5 Probing a fascist cult in 1920s New York, dandy spy hero Lucifer Box is accused of murder.