The Lion Sleeps Tonight

"The Lion Sleeps Tonight" (also known as "Wimoweh") was a song which Mr. Crane ordered played to mask the screams of homeless humans being converted into Cybermen. Crane referred to it as "track number 90". (DW: Rise of the Cybermen)

Behind the scenes

 * "The Lion Sleeps Tonight" is a song -- originally from South Africa -- that has been published under a number of different names. The two most famous English-language recordings were the 1952 "Wimoweh" by and "The Lion Sleeps Tonight", as originally recorded by  in 1961. The name for the 1961 version has become arguably the more dominant in English, if only because of the song's inclusion in The Lion King. The song was not credited in the end credits of Rise of the Cybermen and dialogue only calls it "track number 90" — however, the version used in the episode is Tight Fit's 1982 cover.
 * The fact the song is referenced only as "track number 90", resembles the Master playing "track 6", I Can't Decide. (DW: Last of the Time Lords)