"Die Reise nach Metropolis" or "Voyage to Metropolis" is a 52-minute documentary on the making of Metropolis (1927) and the restoration process."Die Reise nach Metropolis" or "Voyage to Metropolis" is a 52-minute documentary on the making of Metropolis (1927) and the restoration process."Die Reise nach Metropolis" or "Voyage to Metropolis" is a 52-minute documentary on the making of Metropolis (1927) and the restoration process.