"Dr. Jekyll and Mr. Hyde" is a song by English rock band, the Who. It was written by the band's bassist, John Entwistle. The song is about drummer Keith Moon's drinking problems. This is the first of two songs from The Who written about Keith Moon, the second being "Doctor Jimmy" from the album Quadrophenia. Who biographer John Atkins calls it "a macabre tribute to Keith Moon." This song, as well as "Boris the Spider" and "Silas Stingy" all had lyrics that suited children. Kit Lambert had the idea of making a kids' album composed entirely of songs like these, but it never saw the light of day.