It was recorded at the Fillmore East, New York City on Saturday 6 April 1968 and released on 20 April 2018 as a double album on CD, and a triple album on LP.

[1] The band had originally been booked to play four shows over two nights, April 5–6, but fears of social unrest over the recent assassination of Dr. Martin Luther King a few days earlier led to the decision to play just one show per night.

Tapes from both the shows were cut to acetate and nearly released, but the project was ultimately canceled; boots of the acetate appeared a few years later, leading to clamor for a belated official release.

The eventual release contains all the songs played at the April 6 show with the exception of openers "Substitute" and "Pictures of Lily", as only fragments had been captured.

Another difference from the boot copy was the performance of "A Quick One", which on the acetate had stemmed from the show on April 5 and contained an oblique reference to the assassination of MLK at its close.