http://nwhyte.livejournal.com/1700514.html

The last is the most political of the books: K9 is called in to assist the capitalist, colonialist leadership of the heavily polluted planet Tellus (or, as we call it, Earth) to track down a missing colony. "'It's not there,' snarled the president. 'It should be there and it's gone. The whole planet, gone. We own that planet, we've invested billions in it, and we need its raw materials to fuel our power plants and supply our factories. Tellac Inc wants it back. Apart from that they tell me it's playing havoc with navigation ... 0h, and there are a dozen families missing too. Miners, it says here. You better get it back!'" K9 gets caught in a timewarp and finds the missing planet and miners, who are constructing a new Eden with animals from all periods of geological history which they survey by balloon. Votri, the miners' leader, begs K9 to keep his secret; and K9 does so, in defiance of his orders, reporting back to Gallifrey only that the planet has "disappeared from the universe as we know it". ( )