King Biscuit Flower Hour: Greatest Hits Live is a compilation live album by the progressive rock supergroup Emerson, Lake & Palmer. It features tracks from two different tours: The 1973-1974 Brain Salad Surgery Tour, and the 1977 Works Tour.
Almost all the material included here had been released before on other live albums: The five songs from the Brain Salad Surgery tour (Tracks 11-15) were originally included on the 1974 triple Welcome Back My Friends to the Show That Never Ends, and four songs from the Works tour (&Peter Gunn Theme&, &Tiger in a Spotlight&, &C'Est la Vie& and &The Enemy God&) had appeared in 1979 as part of In Concert. In Concert was re-released in 1993 as a two-disc set under the title Works Live, adding seven new tracks. Two of those seven (&Maple Leaf Rag& and &Watching Over You&) have been included here too. That makes eleven tracks.
The remaining four tracks are available legally for the first time: A piano adaptation of the first movement of Keith Emerson's Piano Concerto No. 1 (mislabled as &Piano Improvisation&), a short Carl Palmer solo, and performances of &Fanfare for the Common Man& and &Pirates&. The version of &Fanfare& included here is a performance without the orchestra the band used on some concerts during the tour. One version with the orchestra is available on Works Live. Also, the recording of &Pirates& is, maybe, the unique registered live recording of the track during the Works tour and was originally featured on the bootleg album Works: Volume ½. It does not feature the orchestra as by the time of this recording, the orchestra had been dissolved due to lack of funds to pay them.