On the one hundredth and fifth edition of Reality Bomb, we're getting excited about the arrival of Millie Gibson as the new companion Ruby Sunday as we talk to Jim Sangster and Julie Chaston about what Gibson might bring to the role and how her three years on Coronation Street might prove to be an advantage. Also Graham Kibble-White has an audio essay on Doctor Who's diamond logo and why it's caught the fancy of so many Doctor Who fans over the years. And writer Nev Fountain is taking us on a trip to Lanzarote, or is that Sarn, as Peter Davison's 1984 penultimate adventure Planet of Fire is in the Gallery of the Underrated. Plus a fan reminisces about where they were when Millie Gibson was cast!