"Endless Dream" is a fifteen-minute track divided into three parts, "Silent Spring", "Talk", and "Endless Dream". The repeating piano riff at the beginning of "Silent Spring" came from a longer piece that Rabin intended to use as part of a film score, but chose to use it for the song instead. The piece then moves into a 15/8 time signature. The instrumental section on "Talk" was originally a piece Rabin wrote for orchestra titled "October". Anderson said the song is "as good as anything" the band has done and noted its "remarkable" structure in the "Endless Dream" section, rating it on par with "Close to the Edge" and "Awaken", two long Yes tracks from the 1970s. White also praised the track highly.