Spinal Tap (stylized as Spın̈al Tap, with a dotless letter i and a metal umlaut over the n) is a parody band spoofing the style of British heavy metal groups. The band first appeared on a 1979 ABC TV sketch comedy pilot called The T.V. Show, starring Rob Reiner. The sketch, actually a mock promotional video for the song "Rock and Roll Nightmare", was written by Reiner and the band, and included songwriter/performer Loudon Wainwright III on keyboards. Later the band became the fictional subject of the 1984 rockumentary/mockumentary film This Is Spinal Tap. The band members are portrayed by Michael McKean (as David St. Hubbins), Christopher Guest (as Nigel Tufnel) and Harry Shearer (as Derek Smalls).