"Confusion" is a modification of material from Nyman's previous score, The Ogre, while the Enemy Zero/Invisible Enemy/Battle theme were modified into portions of Nyman's score for Man with a Movie Camera.
Public Enemy | Public Enemy (band) | Public Enemy (group) | Arch Enemy | An Enemy of the People | Enemy at the Gates | The Public Enemy | Sleeping with the Enemy | Enemy You | Enemy at the Door | Enemy of the State (film) | Enemy of the State | enemy alien | Behind Enemy Lines | XCOM: Enemy Unknown | Wolfenstein: Enemy Territory | The Public Enemy (professional wrestling) | The Enemy | Stoupe the Enemy of Mankind | Sleeping with the Enemy (1991 film) | Public Enemy No. 1 | Our Last Enemy | My Enemy | Eating With the Enemy | Behind Enemy Lines (2001 film) | Arch Enemy (band) | The Public Enemy's theme music | The Enemy (UK punk band) | The Enemy of the World | The Enemy of My Enemy |