50 years since Tomorrow's World began, James Burke looks at the future it predicted.
BBC Radio 4
Susan Calman finds out why our feline overlords rule cyberspace.
5/5 Aimee describes how she will be using social media on her way to the next Winter Olympics.
BBC Radio 4 Extra
2/2 Alex Last traces the fate of 12 children named in a series of post-war BBC radio appeals.
In the 1930s Hitler began to rebuild Germany's air force.
BBC World Service
4/5 Why did politicians embrace the selfie in the recent 'selfie election'?
Ian McMillan sets out on a quest to find out about the footballer turned TV comedy star.
In 1944 the International Red Cross was allowed into Theresienstadt concentration camp
4/5 Philip Ball tells how William Perkin brought purple to the people in Victorian London.
3/5 The Olympic snowboarder explains how it feels to be on the receiving end of a fan selfie.