Led Zeppelin IV Songs

Breaking down the band's powerhouse masterpiece, track by track.

A country-blues song from 1929 laid the foundation for one of their most epic tracks.

Robert Plant longed for the freedoms of the rural Welch countryside – or, maybe, Middle-earth.

Surveying the song's pop culture legacy — from 'Wayne's World' to cover songs to radio station publicity stunts.

Robert Plant duets with Sandy Denny on elegiac folk ballad.

Spontaneous shift of gears led the band to create this homage to '50s rock.