The Spy slips behind enemy lines, unleashing a campaign of deception and terror with special abilities. The Spy can <l:6,127>incite a revolution<e>, encouraging an enemy <l:6,104>city<e> to start its own Civilization; <l:6,55>spy<e> into a city, showing the player the city's contents; <l:6,39>assassinate<e> a major figure to cause panic and discontent; <l:6,56>steal advances<e>; or <l:6,54>plant a nuke<e> in a city. A Spy inside a city can also defend against an enemy Spy who is attempting to attack that city. Exercising these abilities, however, is not free. Each time one is used, the Civilization is charged <l:6,92>gold<e>. The Spy can also detect other Spies, <l:1,55>Assassins<e>, <l:1,43>Clerics<e>, <l:1,51>Slavers<e>, <l:1,50>Abolitionists<e>, <l:1,74>Ecoterrorists<e>, and <l:1,53>Infectors<e>, to name a few.