Anyone researching live television drama will inevitably encounter the well-known obstacle that only a small percentage of live broadcasts were recorded from transmission and subsequently archived. A lesser-known obstacle for anyone trying to appreciate the quality and aesthetics of live drama is that those recordings which were made and archived are not necessarily an accurate representation of the programmes as broadcast.
In the 1950s and 1960s, the recording of live transmissions was largely accomplished via the telerecording process, resulting in a continuous record of the broadcast on film. It has usually been assumed that this film recording was then left untouched, and only over recent years has it become clear that this was not necessarily the case. In some instances, once the live transmission of a drama had concluded, the cast and crew remained in the studio and re-performed sections of the programme that were considered to have been substandard on broadcast. These scenes were also telerecorded and could subsequently be edited into the master recording to create a more polished version of the whole programme.