Rather fine 50s scifi that is very Quatermassy (it was intended to be a sequel to the original Quatermass movie, but Hammer couldn’t get the rights), and rather good. It has a creature reminiscent of The Blob, and the effects in this film are better than The Blob, actually. Dean Jagger does a really good job as the American scientist in Scotland – good character actor. Very enjoyable scifi from Hammer before they concentrated so much on horror.
Mark discussing Quatermass on the Talk Without Rhythm Podcast