Before the gas chambers of Auschwitz, there was Tiergartenstraße 4. In this powerful and sobering episode, host Kat uncovers the little-known history of the Nazi T4 Program—a state-sponsored campaign of mass murder targeting disabled children, adults, psychiatric patients, and war veterans deemed “unworthy of life.” We explore how T4 laid the groundwork for the Holocaust, not just in its methods, but in its ideology. You’ll learn how autistic children were among the first to be killed, how American eugenics policies influenced Nazi doctors, and why these atrocities were considered "mercy deaths" by those who carried them out.

This episode also examines the deeply complicated legacy of Hans Asperger, the Austrian pediatrician whose name became synonymous with a type of autism, and whose involvement in the T4 system was hidden for decades.