5th Dimension was the The Byrds’ third album after their blockbuster opening and second releases, Mr. Tambourine Man (June 1965) and Turn! Turn! Turn! (December 1965). While not a commercial success on the level of its predecessors, it marked the band’s innovative shift from pure folk-rock into a blend of psychedelic rock and country-rock. The standout track, “Eight Miles High” was written by original Byrd Gene Clark, who would exit the group before 5th Dimension was completed and released on July 18, 1966. The remaining cuts on the album are a delightful mixed bag of rich harmonies and Roger McGuinn’s jingle-jangle Rickenbacker guitar, from the countrified “Mr. Spaceman” to the spacey “I See You.” The album is available for purchase as a CD or individual mp3 files on Amazon, or as iPod tracks on iTunes. The Byrds appear in Dr. Rock’s Playlist Vault.