Josie Long presents stories of investigations - both amateur and professional.

The comedian Alex Edelman describes his search for a missing cult legend, a German historian talks about the trouble of tracking down Hitler's head and a group of young mothers gather together to solve the mystery of disappearing teething powder.

Series Producer: Eleanor McDowall A Falling Tree production for BBC Radio 4

The items featured in this programme are:

Maria Produced by Martin Johnson

Hitler or Bust Produced by Rose de Larrabeiti

Teething Problems Produced by Luke Eldridge

Finding Joe Hammond Featuring Alex Edelman Produced by Sophie Black.