The 1957 film version of "Quatertmass II" was superior to its predecessor, and one can only assume that the serial was too; again, it obviously goes deeper into the various themes than the film does, but it's interesting to see how Kneale was able to compress his own work without losing the essential quality and potency of his concept (we've seen several films which have had large chunks removed from them with the result that one would hardly recognize the original - but it's certainly not the case with the Quatermass series!).
All things considered, I guess I prefer the films to the serials for two reasons: one, the fact that the former - even if still done on a low budget - were invariably more polished (given their crisp photography as opposed to the fuzziness of a TV program); the other reason is the essential tautness of the films - the serials don't necessarily feel draggy and are certainly never boring but, watched in one sitting (which, I guess, was never the intention to begin with!), Kneale's gripping and thought-provoking plots could make for a tiresome overall experience!!
John Robinson replaced Reginald Tate (who had died in the meantime) as Professor Quatermass; he does a good job at it but, from the three actors who performed the character on TV (I haven't watched John Mills in the final serial, named simply QUATERMASS, from 1979), he's the one who comes closest to Brian Donlevy's interpretation in the first two films and which so dissatisfied Kneale! The cast also features Hugh Griffith as Quatermass' assistant and future stalwart of British horror cinema Rupert Davies as a government official.
The fact of these being live broadcasts was betrayed more than anything else during this particular serial by the surprising number of lines flubbed by the actors throughout - chief among them Robinson himself! Besides, even if scenes that were made memorable by the films (which I obviously watched prior to the serials) generate their own tension and excitement on the small screen, the film's ending is preferable to the one presented here - in which Robinson and Griffith are flown into outer space in order to destroy the planet which was attempting to colonize Earth.
