Before WikiLeaks became one of the most controversial organisations in the world, Julian Assange was a teenage hacker from Australia with a fascination for secrecy. 

In this episode, we trace Assange's journey from hacking NASA and the Pentagon to developing the philosophy that would eventually underpin WikiLeaks. We unpack the leaks that first put the organisation on the map, from government corruption in Kenya and Guantánamo Bay documents to Scientology secrets and Australia's internet censorship blacklist.

And finally, we meet the whistleblower who would change everything: Chelsea Manning. Part Two is out now.

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