Quatermass and the Pit Trailer (1968)

Trailer for Qautermass and the Pit.

During excavations in London a large unidentified object is unearthed. It defies definition although the area has always been associated with diabolical evil. Within its walls Professor Quatermass (Keir) discovers the remains of intelligent alien creatures that attempted to conquer the Earth in prehistoric times and, through their experiments on early man, altered human evolution to its present state. Though dormant for many centuries, the excavations threaten to unleash the terrifying force of the aliens upon mankind once again...