The Documentary, a BBC World Service program (or programme) recently aired a 3-part series called Danger In The Download.
It's definitely worth a listen. All of the episodes are now available online.
Episode 1 — The growing threats in cyberspace from hackers and cyber weapons. Episode 2 — Is the net's architecture and governance is still fit for purpose? Episode 3 — What governments can do to protect the Internet.
If you prefer your audio in the form of a podcast, we also recommend PRI's The World: Technology Podcast which is also offering Episode 1 for download.