The Moody Blues are a British rock band known for their fusion of rock with classical music, pioneering a genre known as progressive rock in the late 1960s. The band's original members included Denny Laine, Ray Thomas, Mike Pinder, Graeme Edge, and Clint Warwick, but its most enduring line-up became Justin Hayward, John Lodge, and Edge. They gained significance with their 1967 album "Days of Future Passed," which included the hit "Nights in White Satin." This album marked a departure from the R&B sound of their earlier work and established the Moody Blues as innovative contributors to the psychedelic and progressive rock scenes.