Theory:Doctor Who television discontinuity and plot holes/The End of the World


 * Why would Cassandra call herself a little boy while it is easy to notify her as female?
 * Perhaps she got a sex change and became Cassandra. Also, Cassandra had already made several false statements about the past, such as mistaking a jukebox for an iPod, and stating that an ostrich could breathe fire and had a wingspan of fifty feet.
 * In the companion book Doctor Who: Monsters and Villains, an extract from a book by Vox B. Macmillan heavily implies that Cassandra was once known as Mr B. E. Cobbs.


 * What happened to the mega-cities and patches of fire seen in The Long Game, Bad Wolf and The Parting of the Ways?
 * This is the year 5 billion. A lot of time has passed since 200,100. Furthermore, Earth was preserved in a classic state. This probably does not include mega-cities.


 * Why does the air conditioning system return to normal once the Earth is destroyed? Surely the heat is still there?
 * The Earth could easily be absorbing and, in turn, radiating heat from the Sun.


 * How would tiny robotic spiders have the physical strength to drag a humanoid into a ventilation shaft
 * We don't know how much the person weighed and plus there were lot of robotic spiders


 * Why put the system restore switch in such an inaccessible location? Having to dodge giant fans in order to get to such an important control beggars belief.


 * Why exactly does Jabe have to sacrifice herself? Why couldn't she or the Doctor jam the lever thingy with its cover, or a shoe, or snap a bit off Jabe's head and wedge it in? Or use the sonic screwdriver to fuse the thing in place? Even if Jabe was so determined to sacrifice herself for the greater good, rather than just lean on the lever, why didn't she sit on it? (Keeping it pressed down even after she burned to a crisp)


 * Cassandra's back-up plan seems a little strange. How will she explain her survival without being punished for using a teleportation device?


 * Why did the 'National Trust' move the continents back to their configuration from Rose's time? Why would this period be considered 'classic' Earth as opposed to any other era out of billions of years of Earth's history?