About this showing of How Do They Do It?
How do they run Ryker's Island, one of the biggest jails in the world? How do they make the famous Royal Mail post box? And how do they turn fruit into jam.
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Previously on TV
Previously shown on High Street TV 4 on Tue 15 Sep 2026 at 00:30.
This showing was on High Street TV 4 at 00:30 on Tue 15 Sep 2026. See future airings below or open the main programme page for the latest TV times.
How do they run Ryker's Island, one of the biggest jails in the world? How do they make the famous Royal Mail post box? And how do they turn fruit into jam.
The next currently listed showing is Tue 15 Sep 2026, 07:00 on Discovery Science .Turbo.
See all current showings