Filming took place between 26 August 1978 and 23 December 1978 at locations around Middlesex and Hertfordshire as well as London, including Wembley Stadium. The budget was £1.25 million (£ in ), making it one of the most expensive undertakings Euston had attempted at that time. Production designer Arnold Chapkis constructed several large and elaborate sets, including those for the megalithic standing stones at Ringstone Round, the Kapps' radio telescope and observatory, and the decaying urban landscape of London; Kneale quipped about the radio telescope set that "it probably would have worked if they'd just aimed it properly!". Associate producer Norton Knatchbull noted that the serial "was the first 'art department' picture Euston has ever been involved in, in the sense that major sets had to be built on location". This led Euston executive Johnny Goodman to joke, "Our biggest problem was finding someone who wanted the two giant telescope dishes after we finished filming. There's not much demand for such things". One aspect where the budget was less than generous was with the model sequences made by Clearwater Films; Johnny Goodman remarked that the cost was less than James Bond producer Cubby Broccoli "would spend on cigars in a week". Post-production was completed in mid-February 1979. Unlike the original BBC "Quatermass" serials, which had used stock music tracks, the new serial had a specially composed soundtrack by Marc Wilkinson and Nic Rowley which made particular use of the nursery rhyme "Huffity, Puffity, Ringstone Round" devised by Kneale in his scripts.