Half-Life: 3. Lost

Joe's research into his great-grandfather's work takes him to Ammendorf, south of Berlin - one of the key sites of Nazi Germany's chemical weapons production.

Written and presented by Joe Dunthorne
Produced by Eleanor McDowall
Music by Jeremy Warmsley
Mixing engineer, Mike Woolley
Story consultant, Sarah Geis
Executive producer, Alan Hall
A Falling Tree production for BBC Radio 4