Under the Sun S04 E02 Tribes of Europe: 2: Without a City Wall

The Abrahamses have returned to Berlin after 50 years in Russia. Stefan Brandt and his half-sister Irmgard Wittkuhn were separated by the Berlin Wall for 30 years. Together they now re-open the case against their father who was accused of spying. In a changing, disorienting Berlin, both families reach a new understanding of what it means to be German.