First broadcast: on BBC One Scotland HDLatest broadcast: on BBC One Wales
John Humphrys puts the questions to some of the UK's cleverest celebrities. Featuring Vincent Franklin, Christian Malcolm, Chris Warburton and Graham Fellows. Show more
Live Lessons goes behind the scenes at the BBC with Newsround’s De-Graft Mensah, Saturday Mash-Up's Shereen Cutkelvin and Hacker T Dog to celebrate 100 years of BBC Education. Show more