Is the person in the Vault in Doctor Who series 10 really who we all think it is?

Still, scroll below the spoiler-squirrel at your peril… Missy was in the vault.

It was all set up thousands of years ago.

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There are just a few things that throw doubt on this.

Were half-way through a series after all, and there are still lots more mysteries to unbox here.

What we dont get is just when this is all taking place.

What if, then, it took place 3000 years ago?

The assumption, and its not an unreasonable one, is that hell be back as The Master.

That weve hadThe Three Doctors,The Five Doctors,The Two DoctorsandDay Of The Doctor.

Now, it looks like well get The Two Masters too.

But what it he knows that the Master is in there, and about to regenerate?

Could there be a War Master, even?

Do we think about stuff like this too much, and do we need a good lie down?

Further to that…

Ah, now heres the fun theory doing the rounds.

Inside the vault is: The Doctor!

The new one, more to the point.

The working logic here would be that the new Doctor the replacement for Peter Capaldi has already been cast.

And that rumour centres on Bradley playing the first Doctor.

That doesnt, of course, mean that hes in the vault.

But it certainly increases the possibility of that being the case.

Lets go out on a little bit more of a limb here.

So then: whats the link?

Was it just a couple of pictures on the Doctors desk at work?

Im not convinced she and/or River are in there, but I still wonder if theres something there.

Not just any Cybermen, either: the Mondassian cybermen, Peter Capaldis favourites, fromThe Tenth Planet.

Could whoever that is yet have a part to play in this all?