Theory:Doctor Who television discontinuity and plot holes/The Invasion


 * In episode five, the panel concealing the Cyber Director struggles to close.
 * Probably needs to be oiled.


 * The Cyberman falling from the roof of an IE building in episode eight is clearly an empty costume.


 * Why does Vaughn continue to delegate tasks to Packer, who is obviously incompetent?
 * He can't risk him leaving or becoming antagonized with him as he could tell the authorities of the invasion, which he obviously knows about. Alternatively, Packer is the brother of Tobias, so he's keeping him in work because of the only being the Vaughn boys fear - Old Mrs Vaughn.


 * What happens to all the Cybermen that come out of the sewers? The Doctor and UNIT only seem to stop the Cybermen deliver their bomb, and the Cybermen who have invaded are unaccounted for.
 * Attack of the Cybermen would later reveal some returned to the sewers. In episode dialogue reveals that UNIT plans to take care of the remaining after dealing with the Megatron Bomb and the Cyber-Spaceship.


 * In addition to the above, what do the Cybermen actually do after they have invaded? They are not really seen after the episode 6 cliffhanger, and characters seem to be able to move about without meeting them. Also, what is the point of seizing control of London in this way when the whole human population is under Cyber-hypnotic control at this point and the main invasion force is en route already?


 * Zoe and Isobel wait to be captured in episode 2.


 * In episode 4, the Doctor and his companions claim to have seen a ship on the moon - when they didn't.
 * In the DVD's animated episode 1, a ship was added to cover this up (you never see the moon in the original though).


 * how can human weapons harm cyber ships?
 * The missles may have been modified by UNIT or Torchwood.