With its tale of an invasion by an invisible enemy indistinguishable from ourselves, Quatermass II is very much the British Invasion of the Body Snatchers, unfortunately, despite boasting a fine script, it just doesn't come together onscreen. Kneale's story reflects the widespread anxiety of the nuclear age and taps into contemporary fears about the red threat, although in a less direct way than the American science fiction films of the time; taking that metaphor and applying it to the specific conditions of Britain in the 1950s, not just the Cold War paranoia, but the traditional British grumbling resentment of bureaucracy.
Sadly, the acting from the principal cast is abysmal and hampers an otherwise engaging story, especially that of the gravely miscast John Robinson in the role of Quatermass. His difficulty with the technical dialogue and uncomfortable demeanour behind the scenes bleed into his performance, that said, the deck was stacked firmly against him due to the unfortunate death of original Quatermass actor Reginald Tate and Robinson being a last-minute change. However, there's a small bright spot in Episode 4 thanks to Roger Delgado in a supporting role as a journalist who assists Quatermass before falling victim to the mark. The production values are noticeably worse than that of the original serial, which was made for nearly half the amount afforded to this sequel; I will say, however, that the model shots are well realised and the increased prominence of 35mm inserts is more than welcomed.
Quatermass II is an extremely rough ride, there's a small high point during Episodes 4 & 5 but it just falls apart by the end with possibly one of the worst cases of budgetary mismanagement I've ever witnessed. A real shame for what could have been one of the high points of British sci-fi, we can at least take comfort in that Robert Holmes retooled Kneale's ideas from this serial and delivered a much more worthwhile affair 15 years later...