Inspired by a blackout in Oxford. Yorke said 'I used to live in central Oxford, on one of those historical streets, with all these houses built in the 1860's. I came home one night and for some reason, the street had a power cut. The houses were all dark, with candlelight in the windows, which is obviously how it would have been when they were built. It was beautiful'.
Was played by Yorke at the 2006 Mercury Prize ceremony. The song is also featured during the closing credits of Christopher Nolan's 2006 film The Prestige. A remix of this song has been done by Various Productions which Thom Yorke described on the Radiohead blog Dead Air Space as 'a deranged twist'.