Each episode of "Quatermass II" was telerecorded onto 35 mm film during its live transmission, for a scheduled repeat the following Monday night at 10:15 p.m. All six episodes survive intact in the BBC's archives, although the telerecording copies in some cases suffer from poor quality sound and vision. Owing to either technical or artistic problems, Cartier had some scenes re-performed by the cast immediately following the live performance on the Saturday evening, and these were telerecorded and used to replace the live versions in the Monday night repeats. "Quatermass II" was one of the first BBC drama productions to be repeated from a telerecording, rather than having the production re-performed live for any second showing as had been the norm in the past.