 So far, only the first series has been released on CD, but it has been announced that the BBC plans to release the second and third series at an unknown date.In the sleeve notes of the Series One audiobook, written in 2006, series writer Graham Duff asks for assistance in finding episodes "currently missing from the BBC archive".The article is a parody of when television and radio stations such as the BBC used to "wipe" episodes of TV and radio programmes, and record over them, especially the loss of many early "Doctor Who" and "Dad's Army" episodes.