Theory:Doctor Who television discontinuity and plot holes/Twice Upon a Time


 * The ruined place where Rusty is is said to be at the centre of the Universe, but shouldn't Terminus be there?
 * Terminus was a time the centre of the KNOWN universe to its creators, while Villengard is Then ACTUAL centre of the universe.
 * Terminus ends up in the hands of the Vanir, a group with a penchant for Norse-sounding names. The similarly named Villengard and its weapon factories may well have been a later commercial enterprise by the same group, and thus located in much the same place.


 * The actor playing Ben doesn’t bother with a cockney accent.
 * The framing of the scene suggests we're seeing the Tenth Planet flashbacks subjectively, in the Twelfth Doctor's recollections of the First's final hours, trying to work out how the figure in front of him has just appeared. As the First Doctor was dying at the time, and specifically has difficulty hearing Ben's words in the original, asking him what he said, the Doctor simply doesn't remember Ben's voice accurately for those words.


 * Why does the First Doctor not recognise sonic devices? He invented it (TV: A Christmas Carrol) patented it (Audio: The Unknown) and they were in production on Galifrey when he left (Audio: The Beginning).
 * Why is the First Doctor sexist? He comes from a gender-fluid upbringing, he should be above such stuff and unphased by Bill's sexuality.