In 1982, the legendary English heavy metal band Spinal Tap attempt an American comeback tour accompanied by a fan who is also a film-maker. The resulting documentary, interspersed with powerful performances of Tap's pivotal music and profound lyrics, candidly follows a rock group heading towards crisis, culminating in the infamous affair of the eighteen-inch-high Stonehenge stage prop.

Directed by Rob Reiner and starring Christopher Guest, Michael McKean, Harry Shearer and Bruno Kirby, THIS IS SPINAL TAP is regarded as one of the greatest 'mockumentaries' of all time.