Was I the only one who thought the errant device might have been the Master’s TARDIS (or at a push some other Time Lords TARDIS)? The Doctor danced around saying it only referring to it being a time travelling ship, but seriously a perception filter would be how the TARDIS chameleon circuit would work if the Doctor turned it back on right? The fact it interfered with the TARDIS operation is also a fairly big pointer? Discuss?

I was mildly irritated by the potentially spoiler infested trailer for the series finale, but I guess I’m just going to have to get used to that sort of thing.