An origin story for the Cybermen of Mondas, written by Marc Platt. It was an inspiration of sorts for the ''[[Doctor Who (TV)|Doctor Who]]'' episodes "[[Doctor Who (TV)/NS/Recap/S2 E5 Rise of the Cybermen|Rise of the Cybermen]]" / "[[Doctor Who (TV)/NS/Recap/S2 E6 The Age of Steel|The Age of Steel]]" (on which Marc Platt got a story credit): one of the story's most powerful scenes (the Doctor speaks to a partially-converted Cyberwoman who does not understand what's been done to her) is drawn from this audio.