Roald Dahl
From Tardis Wiki, the free Doctor Who reference
Roald Dahl was someone whom the Twelfth Doctor claimed had an even darker sense of humour than himself, only on Tuesdays and Thursdays. (COMIC: The Hyperion Empire)
Behind the scenes
Among works by Dahl is Charlie and the Chocolate Factory.
Cardiff-born Roald Dahl is of course the namesake of Roald Dahl Plass, a major location in the Doctor Who universe as the location of the Cardiff Rift and the Torchwood Three base.