This release features the soundtracks from 2 television episodes that are no longer in the BBC archives. The episodes are both from the fourth series and are The Flight of the Red Shadow and The Wrong Man. Both of these episodes were recorded by fans when they were first transmitted and are therefore one of the earliest examples of home television recordings. Both of the episodes were in the THAS archives but have been enhanced using the latest BBC technology. A planned release of two further episodes (The Horror Serial and The Beauty Contest) have not materialised.