Brigadier Lethbridge Stewart:  A few months ago , the superpowers , Russia , America , and China , decided upon a plan to ensure peace . All three powers have hidden atomic missile sites . All _ three _ agreed to give details of those sites plus full operation instructions to another neutral country . In the event of trouble , that country could publish everyone 's secrets and so cool things down . Well , naturally enough the only country that could be trusted with such a role was Great Britain .
Doctor Who: Naturally , I mean the rest were all foreigners .
Brigadier Lethbridge Stewart: Exactly .