El primer tema, "Astronomy Domine" pertenece al disco "The Piper at the Gates of Dawn"; "Careful with that Axe, Eugene", es el lado B del sencillo "Point Me at the Sky", editado en 1968; "Set the Controls for the Heart of the Sun" y "A Saucerful of Secrets" pertenecen al disco "A Saucerful of Secrets".