View source for The Ark (novelisation)

== Deviations from televised story ==
* The unnamed human initially on trial and subsequently minimised is called Niash. He's later re-enhanced at the story's conclusion where he is greeted by the Doctor, Steven and Dodo, alongside other restored Guardians and Monoids eager to start their new lives together on Refusis II.
* In the novelisation, the Doctor and Manyak visit other environmental regions aboard the Ark struck by Dodo's spreading cold virus. These include a polar, desert and several cultivation regions, as well as a variety of fauna left unseen in the televised serial. Whilst travelling in the polar region, the Doctor and Manyak are forced to move some corpses to prevent the spread of the virus. Their actions are observed by scouts who relay back to Zentos using their wrist communicators.
* The novelisation expands on how the Monoids appear to be servants to the Guardians. When the Doctor asks why no Guardians work in the cultivation region, Manyak explains that they prefer not to do manual labour, whilst the Monoids apparently embrace it. While hunting a deer, one Guardian falls prey to a boa constrictor and its only through the intervention of his Monoid companion that he survives the encounter.
* The Doctor notes that in the intervening centuries the [[Guardian (The Ark)|Guardians]] have evolved [[Binary vascular system|two hearts]], a larger brain and a smaller intestinal tract. When questioned by Dodo on the subject about himself, he responds that he's had "more experience of adapting", implying a non-human physiology.
* An explanation is provided on why the TARDIS returned to the Ark. During Steven's shift at the controls, he falls asleep and catches one of the levers with his sleeve. The result being that he dislodges the Ship's spatial coordinates and triggers a premature, somewhat disruptive landing.
* While only one male Refusian addressed the expedition in the televised story, Dodo befriends a young Refusian girl in the novelisation with whom she plays tennis. It's during their game that she discovers the aliens have extraordinary strength, prefiguring their part in the eventual disposal of the giant statue containing Monoid One's nuclear bomb aboard the Ark. The two Refusians also give themselves names: Charles and Mary, who are brother and sister.
* The novelisation explains how Monoid One is the leader. He is Monoid One XVII and is a descendant of the original Monoid revolutionary leader, Monoid One I the Great. Rather than being killed outright, he flees from the rebels across Refusis's surface, trying to scale a cliff and reach a cave. A stray shot causes him to fall. He's swept up in the river below and plunges over the edge of a waterfall where he presumably drowns.
* The televised cliffhanger in which the Doctor turns invisible leading to the domain of the Celestial Toymaker is removed. Instead, the novelisation ends with the Doctor attempting to teach Dodo to drop her colloquialisms with a quote from ''My Fair Lady'' as the TARDIS flies on through the universe. He promises his two companions a journey, but no guaranteed destination.