In Cascais, the “greatest band in the world,” with “the best album of all time” in tow, landed in the land of all illusions, where the grayness of decades gave way to color, nightlife, controversy, debate, and effervescent citizenship. Thirty years later, previously unreleased testimonies, sounds, and images from the show reconstruct a puzzle of indelible memories for a generation that in 1975 was young or a teenager.