Welcome to the fifth episode of the podcast we’re dropping on the feed every month in between our regular monthly shows. These are short (20 minute-ish) shows where Rob sits down with a guest and reads letters – the primary sources of the title – about Doctor Who from the 80s and 90s, for the purpose of kick-starting a conversation. Vitally, the guest doesn’t know anything about the letters until the recording. In this episode, Rob talks to author, Iain Martin, who is also half of the All of Time and Space podcast. This is Doctor Who without a safety net. The conversations could go anywhere the guest wants them to go. This is Primary Sources.