Should a robot be allowed to react if it is attacked by a person? A new blueprint for robot makers aims to set out how machines should behave. Plus the UK Parliament committee scrutinising Facebook demands an explanation after reports the company knew about the misuse of its data by a political consultancy earlier than it had claimed. Presented by Jane Wakefiled, with BBC Online tech editor Leo Kelion, and special guest Annabelle Timsit from the Quartz website.

(Image: Stock photo of man shaking hands with a robot, Credit: iStock/ Getty Images Plus)