Quatermass and the Pit is a 1967 British science fiction horror film from Hammer Film Productions. It is a sequel to the earlier Hammer films The Quatermass Xperiment and Quatermass 2. Like its predecessors, it is based on a BBC Television serial, in this case Quatermass and the Pit, written by Nigel Kneale. The storyline, largely faithful to the original television production, centres on the discovery of ancient human remains buried at the site of an extension to the London Underground called Hobbs End. More shocking discoveries lead to the involvement of the space scientist Bernard Quatermass.