From BBC Radio 4 Extra. Written and Read by Mark Gatiss. Abridged.

LUCIFER BOX. He's tall, he's dark and, like the shark, he looks for trouble. Or so he wishes. For, with Queen Elizabeth newly established on her throne, the now elderly secret agent is reaching the end of his scandalous career. Despite his fast-approaching retirement, queer events leave Box unable to resist investigating one last case...Why have pillars of the Establishment started dying in bizarrely reckless accidents?