More than half of us now live in cities. Crowded, chaotic and bursting with life - these are places under pressure. In this brand new series, Dan Snow, Anita Rani and Ade Adepitan go behind the scenes to reveal the hidden systems and armies of people running some of the greatest cities on earth. Find out how Mexico City keeps its inhabitants safe from earthquakes, and meet local people who offer an inside look at life in metropolises like Delhi and Hong Kong. Meanwhile, Moscow's incredible architecture shows that the world's busiest cities also have some of the richest histories.韩布楚震惊得张大了嘴巴：“原来相爷的结构在这里，铁补天来接楚阎王，而我们那三支随时能够改变标的目的的军队就能斜插过去！或者迎头痛击，或者截断铁补天的后路，或者最坏的情况也是衔尾追击，一举拿下天裂关！而那时候景王座等人还在那里，直好为了追杀楚阎王集中了全部的高手，说不定，能够将铁补天一举击毙！若是那样，则大局在一天之内就能够定了！”