A vintage Peter Green guitar showcase, "Underway" was a highlight from his final album with the band, Then Play On, in 1969. As Green told Rolling Stone in 2001, "It was spontaneously composed by the whole lot of us all just playing in the studio and recording whatever we came up with – free-form. It's what I used to play before I had my problems." (See the 2009 documentary Peter Green: Man of the World for his full sad story.) Onstage, Green and the band would stretch "Underway" into a dazzling 16-minute jam, as best heard on subsequent live collections like The Vaudeville Years.