Danny Robins takes a deep dive into all the cases so far this series, with new leads, new witnesses and listeners' questions and theories.

Written and presented by Danny Robins

Editing and sound design: Charlie Brandon-KingMusic: Evelyn SykesTheme music by Lanterns on the LakeCommissioning executive: Paula McDonnellCommissioning editor: Rhian RobertsProduced by Danny Robins and Simon Barnard

A Bafflegab and Uncanny Media production for BBC Radio 4