I was wondering if it’s only Doctor Who which does this. In Caves of Androzani Spectrox is the most precious, but earlier, in The Ribos Operation, Jethryk (sp?) is. Guess that’s what comes of not keeping a show bible. Is this a common continuity error, or am I just crazy? Does anyone else have examples of this?
Most Precious Substance can vary considerably with changes in the supply and the technology and economy of the cultures that value them. Maybe someone struck a huge Spectrox deposit, making the stuff dirt cheap? Or Jethryk used to be indispensible until someone discovered that WD-40 could be used as a substitute?
It’s polonium, dude.
Love is the most precious substance in the universe. Don’t let anybody tell you different. 