A Bermejo painting is the subject of Episode 8!
This is called Saint Michael Triumphant over the Devil. It was painted by one Bartolomé Bermejo in 1468.
If you look really closely, you'll see a really scary devil character at the bottom with a big grinning smile. It was probably the central panel of an altarpiece which was in the church of San Miguel (Saint Michael) in Tous, near Valencia.

Marina Ventura and The Micro-Gridders: The Super Squad
05:17

The Circular Trail: a free Time Hunters history walk around the City of London
46:10

Marina Ventura and The Micro-Gridders: The Power Stash
05:25