5. Exchanging Currency
The quest for control is a kind of greed. The need to categorize, contain, manage, when taken to the extreme, is a form of madness. How fitting that gold, at least until the next upgrade, is a cyberman weakness. Maybe its not just the old code that contributes to that but also the human parts. Artie pays for a chance to play chess against a cyberman with a sandwich. Angie is rewarded with an imperial penny after she cleverly figures out a clue to how the chess game works. The coin also enables her to guess Porridges true identity as the emperor. The sandwich, of course, is much more valuable than the penny at this point. Food nourishes you. Currency is not limited to money; it is general acceptance or circulation as in the currency of ideas. The Doctor has removed himself from circulation voided his currency. He deleted his history. Yet according to the cyber-doctor he left holes that could still be exploited. Perhaps he is not as well hidden as he once thought.