In his lifetime, Rory MacLean has known three Berlins: West Berlin, where he made movies with David Bowie and Marlene Dietrich, East Berlin where he researched his first book, 'Stalin's Nose', and now the unified capital. In this series of Berlin walks, he shares something of this city that thrills, delights, haunts and infuriates him. Something of what he loves about the place, and what it is about it that makes him return again and again.