Woo hoo - I can't believe we're at the end of The Scales of Unjustice. And I'm pleased that we open this bit with a nice scene with Sergeant Benton, who was always my favourite UNIT regular when I was a kid. Benton mentions both The Web of Fear and, from The Invasion, Major Billy Rutlidge. We also learn that both Hawke and Bell had been members of UNIT from day one, alongside Jimmy Turner and Sergeant Walters, as well as Jack Tracy, all from The Invasion. Cosworth is the posh, rather unimpressive, guy from The Mind of Evil. Beech & co, the solicitors, are named after Andrew Beech, a former lawyer who now runs a company that put on one of the many Doctor Who conventions in the UK. I love the fact that Benton doesn't see himself as officer material at this stage. I could hear John Levene's voice saying all those lines quite clearly.

The Doctor's route through the Vault takes in Nestene energy spheres from Spearhead from Space, a phial of Silurian plague from, oddly enough, Doctor Who and the Silurians, the cyber-guns from The Invasion and even an imperial Dalek from Remembrance of the Daleks. Also from Remembrance is the body of Ratcliffe, and as we carry on through the morgue we meet Krimpton from The War Machines, Weams from the Web of Fear, Hibbert from Spearhead from Space and Gregory from The Invasion. I'd love to say that the inclusion of Hibbert's body is some subtle clue to the fallibility of the Pale Young Man and the Vault, that they can make mistakes. Because, as you and I know, Hibbert's body was completely vaporised by Channing's Autons. Truth is, I cocked it up. Sorry.