This expanded edition has been newly remastered from the original master tapes and features 15 bonus tracks, including the previously unreleased promotional edit and a 'Top Of The Pops' recording of 'Northern Lights', along with a BBC Radio session from August 1978 and the other two CDs comprising the entire concert recorded at the Tower Theater in Philadelphia on 4th December 1978, appearing in full on CD for the first time, with an additional 55 minutes worth of unreleased tracks. The release also features an illustrated booklet with a reproduction of the band's 1978 US tour programme and new essay.