Theory:Doctor Who television discontinuity and plot holes/Ghost Light


 * After having been given considerable screen time in Episode One, Redvers' glowing snuffbox disappears from the plot. No reason is subsequently offered as to why Josiah would want to trap his non-expendable would-be assassin in a room with an exposed radioactive source.
 * Why does Josiah think that killing the Queen will mean that he takes over the Empire?
 * Because he's an alien who doesn't understand how the line of succession works. He's operating under the assumption that he can 'evolve' through natural selection to the top of the food chain.
 * It is also strongly implied that Josiah killed the previous owner of the house (Gwendeline's father, Mrs. Pritchard's husband) and hypnotised the remaining inhabitants of the house in order to seize control of it in the first place. So he just assumes that is the way power works. Even though this plot should have been the main focus of the story, the main plot in the televised version is Light threatening to reduce the Earth to a barron planet composed nothing but primordial soup.


 * Light is strongly opposed to the idea that any lifeform can change or evolve in any way, and yet it is implied Josiah's purpose is to be sent to the surface of a planet and evolve itself to become the planets dominant lifeform, so why would Light keep Josiah as a member of his crew and not just destroy him?
 * It is not clear what species Light is, or where he is from, or how he came across such astonishing power. It is also unclear what species Control and Josiah are and how he came across them.
 * In Episode Two, Rev. Matthews is rendered unconscious by what may be chloroform, during an argument about evolution with Josiah. Upon waking up Rev. Matthews continues the argument with Josiah and while eating a banana slowly transforms into a monkey. It is unclear how this was possible along with why the devolved Rev. Matthews freezes at 6 o'clock along with the other permenant inhabitants of the house.
 * At the end of Episode One Ace discovers Josiah's husks which are under Control's influence and guidance. Control refers to Ace as "Ratkin", and no explaination is offered as to why. Ace brings it up a few times later but Control still offers no explaination. Perhaps there is an explaination in the novelisation.