Estranged for the last 15 years and looking all the much worse for wear, Nigel Tufnel (Christopher Guest), David St. Hubbins (Michael McKean), and Derek Smalls (Harry Shearer) are inveigled to reunite onstage for a farewell concert in New Orleans. Documentarian Marty Di Bergi (Rob Reiner, who directed) returns after four decades to chronicle Spin̈al Tap's last chapter, in this anticipated follow-up featuring appearances from Paul McCartney, Elton John, Garth Brooks, Questlove, Lars Ulrich, more. 83 min. Widescreen; Soundtrack; English. Two-disc set.