World of SecretsDr SkinEpisodes Episode guide

Back up to: World of Secrets

1. Trailer

   1/5The ugly truth behind the early origins of retinol, now key to the modern beauty industry
2. Dr Skin 3/5

   The search for answers reveals what else was being tested at Holmesburg

   Next on

   Wed 2 Dec 202604:32GMT

   BBC World Service
3. Dr Skin

   The creams and serums millions rely on to make themselves look younger have a dark past

   Next on

   Wed 25 Nov 202604:32GMT

   BBC World Service
4. Dr Skin

   The creams and serums millions rely on to make themselves look younger have a dark past

   Next on

   Wed 18 Nov 202604:32GMT

   BBC World Service
5. 16/12/2026 GMT

   Survivors of Holmesburg prison ask if they will ever see justice
6. 09/12/2026 GMT

   Prisoner testimony reveals just how far Holmesburg's experiments were allowed to go