Izzie and Dr Becky complete their tour of the solar system with a trip to Mercury, the space spirograph (copyright: Dr Becky). Join them as they explore what we know about the planet so far and what ESA's current mission, BepiColombo, is hoping to find. Plus, Dr Robert Massey is on hand to answer your questions.  Special thanks to guests Dr David Rothery from the Open University and Dr Simon Lindsay from the University of Leicester.  Don't forget to send your questions to the team via podcast@ras.ac.uk or Instagram @SupermassivePod The Supermassive Podcast is a Boffin Media production for the Royal Astronomical Society. The producers are Izzie Clarke and Richard Hollingham.