Hi there,
Could you try to add any of the following titles, please? I notice that you already have the second and third Quatermass films, 'Quatermass II' and 'Quatermass & The Pit', but not the first movie from 1955. I've also added some later TV versions to the list below. They may be a bit obscure now, but they're considered absolute classics, so if you are able to locate them, it would be greatly appreciated. Many thanks!
(1) The Quatermass Xperiment (1955) - tt0049646
https://www.imdb.com/title/tt0049646/
(2) Quatermass (1979 TV Miniseries) - tt0078129
https://www.imdb.com/title/tt0078129/
(3) The Quatermass Conclusion (1979) - tt0823523
https://www.imdb.com/title/tt0823523/
(4) The Quatermass Experiment (1953 TV series) - tt0045436
https://www.imdb.com/title/tt0045436/
(5) The Quatermass Experiment (2005 TV remake) - tt0450315
https://www.imdb.com/title/tt0450315/
(6) Quatermass And The Pit (1958-59 TV series) - tt0051305
https://www.imdb.com/title/tt0051305/
Thanks again,
Rasko