Theory:Doctor Who television discontinuity and plot holes/The Power of the Doctor


 * How did Vinder end up on the Metal Planet in 1916, when his previous appearances were all in 2021 and there was never a hint he could time travel?
 * He travelled through the wormhole as part of a mission to search for the missing Qurunx from the bullet train.


 * The Thirteenth Doctor's final words are "Tag, you're it." However, in the game of tag there are no tag-backs.
 * 1) 13 didn't know it was going to be a 'tag back' so her saying it is fine. 2) Tag back only applies to the immediate predecessor, Tennant was 3 before Jodie.