The Slide by Victor Pemberton

The original BBC Radio horror serial of creeping, sentient mud

BBC Radio Dramatisation in seven parts. Starring Roger Delgado, Miriam Margoyles and Maurice Denham

This landmark production from 1966 is one of those things that stands a good chance of realling creeping you out - without even trying. It’s taut and the central threat is novel. It’s is easy to see why the author used this story as the basis of an original novel, and a Doctor Who script in 1967.

Whenever I refer to The Slide, I always invoke another classic science-fiction serial and describe it as “Quatermass for radio”.