US version
01. One
02. The Prince [Diamond Head cover]

UK version:
01. One
02. For Whom The Bell Tolls [Live In Dallas]
03. Welcome Home (Sanitarium) [Live In Dallas]

UK picture disc
01. One
02. Seek & Destroy [Live Dallas]

Japanese EP version:
01. One
02. Breadfan [Budgie cover]
03. For Whom The Bell Tolls [Live In Dallas]
04. Welcome Home (Sanitarium) [Live In Dallas]
05. One [demo]

12" UK vinyl single:
01. One
02. For Whom The Bell Tolls [Live In Dallas]
03. Creeping Death [Live In Dallas]
04. One [demo]