This was the British release of the album, also put out as a special edition, and eventually becoming the standard release after remastering. The difference between this and the original American release is the "fourth" side. The title referred to the vinyl release; this was a two record set, which meant there were four sides to it. Three sides had live material, while the fourth side had studio tracks that were cut from the last couple of albums. The tracks were "Paper late", "You Might Recall", "Me And Virgil", "Evidence of Autumn" and "Open Door". They are not included with the album any longer, but all except "Me And Virgil" were included with the Archive #2 boxed set.
This version has a fourth studio side instead, with older material. The material is excellent, though the track breakup is strange. "One For The Vine" is a longer song with two sections, though they were never separated by the band in any way. It's a story of a soldier who no longer believes in his leader, becomes a leader himself to fight against the one he used to serve, and eventually finds that he has become what he is fighting against. There is an excellent musical section, and the recording here is top notch.
"Fountain of Salmacis" is from one of the band's very early albums, not often performed with Collins at lead singer. It's a fantastic prog rock song, and leads into a bit of "Watcher of the Skies", one of the first songs to get the group any attention. Though the studio songs that were replaced were great songs, these additions are real treats for hardcore fans of the group.
The first three sides are a great selection of early hits and fan favorites. "Abacab" is the full album version, not the shortened single version. "Me and Sarah Jane" is a beautiful Banks-penned song, this is an excellent performance. "In the Cage" is a medley the band has done many different renditions of; this one has become the sort of standard bearer.
If you are a fan of any Genesis era, there is something here for you to enjoy. Though it isn't from a single performance, which gives it a bit of an uneven feel, each song is performed with near perfection. It is just a great live album, it's what really made me a fan of the group. This gets my highest recommendation, especially if you are any kind of Genesis fan.