‘Flagship’ (monthly) episodes of The Doctor Who Show and many of its off-shoots (eg: Primary Sources, Alternate Galaxies) are hosted by Rob Irwin (@theDWshow) in Sydney, Australia and David Kitchen (@David_Kitchen_) in Melbourne, Australia. Occasionally, they are joined by guest co-hosts such as Mike Solko, Steven B, and Richard Nolan. Over the years, standalone shows have also dropped on the feed. UK author Iain Martin (@theIainMartin), for example, presents an irreverent (and irregular), Doctor Who A-Z show.