8. Those Who Know

Josh and Sara hunt the men who know what really happened to Austin. When the Assad regime fell, they went into hiding.

As the team close in, competing accounts begin to emerge: stories of detention, secret deals, survival and betrayal. Some may be telling the truth, others may be trying to bury it.

Archive: CNN; BBC; NBC; PBS; Al Jazeera.

Writer and showrunner: Josh Baker

Investigative producer: Sara Obeidat

Series producer: Simon Maybin

Field producing: Ouday Al Hussein

Additional producing: Lucy Burns

Open source intelligence: Thomas Bordeaux & Gabor Friesen

Production coordinator: Gemma Ashman

Series editor: Clare Fordham

Head of BBC News Long Form Audio: Emma Rippon

BBC Radio 4 commissioning editor: Dan Clarke

NPR producer: Monika Evstatieva

NPR editors: Robert Little & Katie Simon

NPR executive producer for Embedded: Irene Noguchi

BBC World Service commissioning editor: Jon Manel

Composer: Firas Abou Fakher

Additional music: Karim Chehoury

Theme music: Sam Slater

Mix and sound design: Tom Brignell