Stranger than Fiction

Sony Pictures pulls a major new movie because of a cyberattack and online threats, but who carried out the hacking that led them to cancel it?

Microsoft reveals a real-time voice translation tool for Skype users, and we give it a try. Gavin Andresen from the Bitcoin Foundation tells us the real potential for the technology in the coming year. And researcher Antonio Espingardeiro on how toys are bringing robotics into the home.

Presented by Rory Cellan-Jones, with Dave Lee and Jane Wakefield from the BBC Online tech desk.