Theory:Doctor Who television discontinuity and plot holes/The Ghost Monument


 * The Doctor lends Graham her sunglasses, claiming she got them from Pythagoras. However, she said she lost all her belongings when falling from the TARDIS in Twice Upon a Time. Therefore, how can they be Pythagoras'? The Doctor lying again?


 * Perhaps they somehow found there way into the charity shop the Doctor got her clothes in, she found them, recognised them as belonging to either Pythagoras or Audrey Hepburn when she met them and bought them as well.
 * The line is that they are 'like' an old pair of The Doctor's. Perhaps she picked them up at the charity shop because they reminded her of the ones she got from Audrey Hepburn.. or Pythagoras