Fifth Dimension is the third album by the American rock band the Byrds and was released in July 1966 on Columbia Records. Most of the album was recorded following the February 1966 departure of the band's principal songwriter Gene Clark. In an attempt to compensate for Clark's absence, guitarists Jim McGuinn and David Crosby increased their songwriting output. In spite of this, the loss of Clark resulted in an album with four cover versions and an instrumental, which critics have described as "wildly uneven" and "awkward and scattered". However, it was the first Byrds album not to include any songs written by Bob Dylan, whose material had previously been a mainstay of the band's repertoire.