Theory:Doctor Who television discontinuity and plot holes/The Keeper of Traken


 * Why doesn't the Keeper take the very simple precaution of advising his councellors that he has invited the Doctor to Traken long before he arrives?
 * It is unclear how much time intervened. The opportunity may not have arisen.


 * What has the Master been doing inside his TARDIS for all those years while Kassia grew up? Does he really have that kind of time to spare in his condition?
 * It's a time machine. He is able to make it appear as though Melkur has been waiting in the garden that long when really, for the Master, a much shorter time has elapsed.


 * How could the Master be in the same incarnation but look a bit different?
 * His condition was partially improved when he was exposed to the Eye of Harmony at the end of The Deadly Assassin, hence his slightly different appearance.


 * Why does Nyssa wear a skirt? Most girls and women prefer trousers over skirts for practical reasons and Nyssa has a practical personality.
 * Court tradition, or social convention? The aristocracy of Traken don't seem to lead very active lives, in any case, and only the fosters seem to favour trousers over medieval gowns, since their jobs (gardening and soldiering) require more practical attire. Away from the conventions of Traken, Nyssa will quickly add trousers to her wardrobe.