Under the Wall

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