Air date: 2017-07-18

Runtime: 59 min

Gregg Wallace receives some tea leaves from Kenya and follows them through the factory that produces one quarter of all the tea drunk in Britain.

Air date: 2017-07-25

Runtime: 59 min

Gregg Wallace is at the world's largest dried pasta factory in Italy, where they produce 150,000 kilometres of spaghetti each day.

Air date: 2017-08-01

Runtime: 59 min

Gregg Wallace follows the production of chocolate digestives and discovers that we are all eating them the wrong way up.

Air date: 2018-01-02

Runtime: 58 min

Gregg Wallace explores the Grimsby factory that processes 165 tonnes of fish a week and produces 80,000 cod fish fingers every day.

Air date: 2018-01-09

Runtime: 59 min

Ruth Goodman investigates the origin of Worcestershire sauce, as told by Mr Lea and Mr Perrins.

Air date: 2018-01-16

Runtime: 59 min

Gregg Wallace explores Ribena's Gloucestershire factory. Meanwhile, Cherry Healey is in the lab figuring out why fizzy drinks are so appealing.