A long-dormant tribe from Mars, accidentally liberated by a London excavation, forms a good story peg but routine, somewhat distended development blunts impact of this British-made programmer.
Nigel Kneale’s original script again turns on the Prof. Quatermass character, essayed by Andrew Keir, this time embroiled with a stuffy colonel (Julian Glover) when a scientist (James Donald) discovers skeletons in a London subway expansion. Evil demons, brain waves and sketchy visions of a dying Mars civilization, plus some great special effects work, provide plot complications. Given the predictable science-vs-military conflicts, and the introduction of Barbara Shelley as a female scientist (like Jean Parker and Ellen Drew in other years), film manages to retain interest through suspenseful (if not always clear) exposition of the mysterious creatures. Roy Ward Baker’s direction is professional.