 The concept of sirens creating illusions to lure unwary travellers to their deaths first appears in Homer's "Odyssey", and this concept is much-repeated in Western film and literature.Among the derelicts in the asteroid field are models of the Narcissus escape shuttle from "Alien" (1979), the from "" (1975) and a Klingon Vor'cha attack cruiser from "".The episode was first broadcast on the British television channel BBC2 on 7 October 1993 in the 9