4/5 Dandy spy-hero Lucifer Box must rescue the perfect victim to foil Olympus Mons' plans.
BBC Radio 4 Extra
4/5 After her assistant is found hanging, the detective suspects a train spotter.
5/5 Scouring the railway station, can DS Julie Enfield nail the Lucky Charm killer?
5/5 Time is running out for spy-hero Lucifer Box. Can he reach Olympus Mons' lair in time?