Derbyshire was an English county. Wenley Moor was located there, as was Wenley Moor nuclear research facility. (TV: The Sea Devils, PROSE: Doctor Who and the Cave-Monsters)

In 1976, the Master opened a wormhole in Derbyshire, allowing the Kraals to attempt a second invasion of Earth. He achieved this, by using a genetically engineered alien worm, who had resided in the area for centuries. (AUDIO: Trail of the White Worm, The Oseidon Adventure)

In the 1980s, the Sixth Doctor and Colonel Charles Crichton worked together on UNIT business in Derbyshire. While the Doctor was in Derbyshire with Crichton, his companion Peri Brown stayed behind in London, where she met Joe Carnaby. (AUDIO: I Wish It Could Be Christmas Every Day)

Rupesh Patanjali was born in Chesterfield, a town in this county. (TV: Children of Earth: Day One)

Circa 1992, a giant black panther was sighted in Derbyshire. (PROSE: Cat's Cradle: Witch Mark)

Rose Tyler once went to Derbyshire on a school trip. (COMIC: Monstrous Beauty)