It was markedly different in format from the published script. Most significantly, it was told from the viewpoint of an omniscient author, which allowed for perspectives unavailable to television audiences or those who read the original script. From a behind-the-scenes perspective, it was likely most significant, along with the indivisibly purchased Farewell, Great Macedon, for reuniting Ford and Russell for their first professional engagement as Susan and Ian since the television story The Dalek Invasion of Earth in 1964.