Dieter Moebius (1944-2015) was one of the most important protagonists of avant-garde electronic music in Germany. He was a founding member of Kluster/Cluster (with Conrad Schnitzer and Hans-Joachim Roedelius) and Harmonia (with Michael Rother and Hans-Joachim Roedelius) and worked with several artists such as Brian Eno, Conny Plank, Mayo Thompson, Hellmut Hattler, Asmus Tietchens, Mani Neumeier, Arno Steffen, Jürgen Engler, Jean Hervé Peron, Zappi Diermaier, and Chris Karrer. In 2012, Dieter Moebius was invited to perform music to Fritz Lang's legendary silent film Metropolis (1927). For this purpose, he produced pre-arranged tracks and samples to be treated with effects and combined during live improvisation according to the dramaturgical setting of the film. His impressive work reveals its full power and depth in combination with the images from the film. It was his plan to create an album-length version of this music for release. Unfortunately, Dieter Moebius passed away on July 20, 2015 and was not able to complete the project. With the help and support of Dieter Moebius's widow Irene and two longtime musical partners, Tim Story and Jon Leidecker, the Berlin musician Jonas Förster finished the remaining work and completed the production.