Boléro was a piece of ballet music composed by Maurice Ravel in 1928. (REF: Doctor Who: The Encyclopedia) Ian Chesterton once noted that the people of the year 64 would not have heard it. (PDA: Byzantium!)
Tobias Zed was listening to it whilst working on the ancient Veltino inscriptions found on Krop Tor. The music stopped playing when the Beast contacted Toby through his mind. (DW: The Impossible Planet)
