Spiral Staircase' Part 1 An ancient artefact, fused to the body of a movie star! An above-top-secret counter-UNIT organisation! A humungous jet-black tetrahedron from the heart of the Milky Way, hovering above New York City! The Doctor lost for words - and for answers! Doctor Who, the Daleks, the Cybermen, TARDIS and all other characters and logos are trade marks of the BBC and are used under licence unless otherwise indicated.