Links: The Byrds speak on Fifth Dimension Six Degrees of The Byrds’ Fifth Dimension
Reviews: Adrian's Album Reviews AllMusic Blogcritics Don Ignacio's Music Reviews Head Heritage John McFerrin's Music Reviews Only Solitaire Psychedelic Sight Sputnik Music
Personnel: Jim McGuinn (lead guitar, vocals); David Crosby (rhythm guitar, vocals); Chris Hillman (electric bass, vocals); Michael Clarke (drums); Gene Clark (vocals on tracks Eight Miles High, Why; tambourine and harmonica on Captain Soul; tambourine and vocals on Eight Miles High [Alternate RCA Version]); Van Dyke Parks (organ 5D (Fifth Dimension)); Allen Stanton (string section arrangement (Wild Mountain Thyme, John Riley)