About this episode
Soon after the Berlin Wall went up, a group of students knocked on Joachim Rudolph’s door. They told him they were trying to get people out of East Germany - and they wanted his help. Helena Merriman’s book and BBC podcast are called Tunnel 29 . You can hear the episode of AirSpace with Günter Wetzel here . Say hello on Twitter , Facebook , Instagram and TikTok . Sign up for our occasional newsletter, The Accomplice . Follow the show and review us on Apple Podcasts . Sign up for Criminal Plus to get behind-the-scenes bonus episodes of Criminal , ad-free listening of all of our shows, special merch deals, and more. We also make This is Love and Phoebe Reads a Mystery . Artwork by Julienne Alexander . Check out our online shop . Episode transcripts are posted on our website . Learn more about your ad choices. Visit podcastchoices.com/adchoices