Like the circles of Hell in Dante's 'Inferno', there are many layers of Doctor Who fandom.
The first level is made up of fans who try not to miss the new episodes when they're broadcast and also own a few DVDs.
In the second level, the Who fans owns ALL of the DVDs and will make an effort to visit any exhibitions.
In the third level, the Who fan owns all of the DVDs, plus a few audio recordings of the missing episodes. They may also attend the odd convention too.
To enter the mystical fourth level, the Who fan leaves the existing reality behind and enters an e-space alternate universe of new audio adventures and books that fill the gaps between the known adventures.
Next comes the fifth level: videos featuring Doctor Who actors that aren't actually Who adventures and books with no actual appearance from Doctor Who.
If a Doctor Who fan is dedicated enough to pass through the fifth level, starved of any real Who-related material, they are then allowed to reach the final level, the ultimate challenge, where they sit alone in a room listening to noises.
This record is a Proustian treat for Doctor Who fans who watched it in the 1970s, or for those who have caught up with the Pertwee and Baker mid-70s adventures on DVD, giving listeners the opportunity to enjoy classics like 'Exxilon Control Room' without any annoying interruptions from the actors. You can, of course, also use them as a background to any homemade audio or video adventures.
One word of warning - whilst I welcome the opportunity to celebrate the mastery of Dick Mills and his colleagues at the BBC Radiophonic Workshop, whenever I watch a Doctor Who DVD adventure from the mid-1970s, I keep getting distracted by the sound effects, thinking: "Side Two, Track Four" at key moments in the story.