Theory:Doctor Who television discontinuity and plot holes/The Pandorica Opens


 * 5145 is not in the 51st century. (It is in the 52nd.)
 * River meets Liz 10 in 5145. Liz 10 is clearly old, as Sophie Okonedo's hair was greyed in her appearance, but since The Beast Below was said to take place in the 29th century, the passing of around 2,300 years would make her around 2,600 years old (she was said to be 300 previously).
 * While scanning Stonehenge, how did River Song miss the Cyberman head?
 * The head was shown to be able to move.
 * There is an image on the BBC website for this episode that shows River holding up the Cyberman head in front of the Doctor and Amy. This suggests she did find the head, but it was cut from the episode.


 * How is the Cyberman able to function without a head inside his "helmet"?
 * The Doctor explained that it was the robotics taking over to find a new head, it is likely that the cybernetic suits are given some form of self-preserving AI when they are created.


 * How is a Roman Gladius able to penetrate a Cyberman's armour when 21st century firearms cannot?
 * It was very rusty and already very damaged.
 * It was not Roman but Auton in nature, so it may have had greater strength


 * Its accullarly shown in there previous apperances that they do..


 * If the trap involving Romans, Pandorica and Stonehenge was built from Amy Ponds memories, why are there pieces of Cyberman scattered around?


 * They were guarding the place from the Cybermens point of view, the trap was organised by the alliance and the Cybermen were acting as sentry.

The all teamed up because they believed that the doctor was going to destroy the universe, so it doesn't matter if they like him or not, they all want him gone so that they can and everyone else can survive,
 * How can there be a photo of Rory with Amy in the present if he was erased from time?
 * The Doctor explained that certain things still lived on. He even mentioned a face in a photograph.
 * Why were the Judoon among the Doctor's enemies?