After the 1980 transmissions of the second radio series, the first series was adapted for television and was followed in turn by four further novels, a computer game, and various other media formats.
The first series was adapted for television. This was after the 1980 transmissions of the second radio series. The first series was followed in turn by four further novels. This was after the 1980 transmissions of the second radio series. The first series was followed in turn by a computer game. This was after the 1980 transmissions of the second radio series. The first series was followed in turn by various other media formats. This was after the 1980 transmissions of the second radio series.