Board Thread:The Panopticon/@comment-4028641-20151011010956/@comment-26469787-20151013114117

Danniesen wrote: But this doesn't explain why the Doctor wouldn't know why the TARDIS arrived in the underwater base in the first place. So that is probably unlikely.

Why not? Couldn't it just be that he is encountering yet another bootstrap paradox? The pre-title sequence and final, dialogue-less scene don't reference UtL or BtF.