Inside the Factory (Series 8, Episode 5)

Gregg Wallace embarks on a journey to uncover the mysteries of the Guinness brewery in Dublin, showcasing the process behind producing two million litres of Irish stout daily.

Cherry Healey explores the intricate process of water purification at a water treatment centre, understanding how reservoir water is transformed into clean drinking water for Dublin’s residents and the stout brewery. Additionally, she participates in the hop harvest at a Worcestershire farm.

Ruth Goodman, a historian, investigates the rich history of Irish pubs and uncovers the remarkable tale of how pub games played a pivotal role in supporting the Allies during the Second World War.

Inside the Factory airs on BBC Two on Tuesday, 23 January 2024 at 9:00PM.

The episode is the fifth from the show’s eighth series.