What 1973 double album was The Who's second full-scale rock opera?

The 1973 double album that was The Who's second full-scale rock opera was Quadrophenia.

Released on 26 October 1973, Quadrophenia followed Tommy, the 1969 album that established The Who as pioneers of the rock opera. The earlier A Quick One, While He's Away is generally described as a mini-opera, so Quadrophenia is commonly counted as the band's second full-length rock-opera project. It was also the group's sixth studio album and their third rock opera when that earlier mini-opera is included.

Pete Townshend wrote the entire album, setting its story in London and Brighton in 1965. Its central character, Jimmy, is a young mod struggling with identity, alienation, and the need to belong. The title reflects Jimmy's divided personality and also echoes the band's four members, whose musical themes recur across the record.

The album's demanding arrangements used synthesizers, sound effects, and layered horns. Its 1979 film adaptation helped revive interest in mod culture, while later tours brought the original narrative back to the stage.