The article examines The Byrds’ 1966 psychedelic song ‘5D (Fifth Dimension)’, and Roger McGuinn’s insistence that it was not about LSD despite its title and era. It matters because the song is often interpreted through the counterculture imagery surrounding 1960s psychedelic music, while McGuinn framed it differently.

McGuinn said the song concerned the concept of a fifth dimension rather than drug use. Released during a period closely associated with psychedelic experimentation, it reflected the band’s interest in expansive, unconventional ideas and helped reinforce their connection with the emerging psychedelic sound.