Alex Gibney explores the phenomenon of Stuxnet, a self-replicating computer virus discovered in 2010 by international IT experts. Evidently commissioned by the US and Israeli governments, this malware was designed to specifically sabotage Iran’s nuclear programme. However, the complex computer worm ended up not only infecting its intended target but also spreading uncontrollably.

Iran, 2008. As President Mahmoud Ahmadinejad's motorcade creeps through the teeming streets of Qom Shrine, thousands of people jam hand-written letters into the hands of his handlers. Hearing their President deliver a speech is a thrill, but more promising to these men and women is the hope that their letters - expressing pleas for loans, medical attention, housing and jobs - will be answered. Since his 2005 election on a populist, "man of the people" platform, Ahmadinejad has encouraged Iranians to send him such letters; according to a staff member, he has received about 10 million of them, and has been able to respond to nearly 76 percent. In one letter, a 16-year-old boy says his family has no money and goes to bed hungry every night. According to the staff member, the boy will be helped. As other letters are read, the worker says that "In Islam, charity is a necessity."

What kind of world power is Iran becoming, and how will Western countries deal with it?

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