Instagram's Pretty Picture

As the social photo sharing app Instagram racks up half a billion users, we look at the increasing power of its owner Facebook. Plus, can artificial intelligence perform creative jobs? We discover how an advertising agency has been trying to find out. And the face recognition software that's been causing controversy for some in Russia.

Presented by Rory Cellan-Jones, with Chris Foxx from the BBC Online technology desk, and special guest Kate Bevan, technology journalist. (Image: Couple taking selfie in a park, Credit: Thinkstock).