Fixing undersea cables

We dive the ocean depths to find out how you fix undersea cables that keep us online. Also this week, the documentary that's programmed to have fifty two quintillion different versions. If you're planning to watch all of them you'll possibly need a coffee, so we look at the tech behind coffee bean roasters. And how do you enrich the tech lives of lemurs and parrots ? We speak to an expert.Presenter: Chris Vallance Producer: Tom Quinn(Photo: Illustration of a submarine communications cable. Credit: Christoph Burgstedt/Getty)