Specifically, the Doctor wants Clara to realise there is a difference - that being successful is not the same as morally heroic.

It's definitely a common thread this series - one of the little things I quite liked in The Caretaker was that the Doctor didn't want to be interrupted in his 'work'. I don't think I've ever heard the Doctor refer to it like that before - such a pragmatic assessment of what he does. A duty and responsibility, rather than a diversion from fun.

Ooh - I hadn't thought of that. Maybe the reason why the Doctor asked Clara to 'drive' using the telepathic circuits was to allow the TARDIS to interface with her, and read her.

Later the Doctor was able to analyse the data gathered.

I noticed the cyberman symbol near Missy. I wouldn't be surprised to find out that Clara had been replaced with a more sophisticated version of half-face and is unwittingly leading the Doctor to possible destruction.

Danny Pink is also possibly not human. The Doctor keeps referring to him as 'a PE teacher' - remember the superhuman vault he made to save Clara? It looked rather accomplished for a maths teacher to me. Does he have enhanced physical abilities, which the Doctor has picked up on and believed he had assumed the role of PE teacher at the school?

I thought that even a Olympic Gold Medallist Gymnast couldn't pull that off

I dunno, she kinda reminded me of The Wicked Witch Of The West there, I'm now expecting her to send the flying Winged-Monkeys to capture them.

But in all seriousness I think she's the woman in the shop and whatever her plan is I think Clara is unintentionally helping her.

Yes, he does have enhanced physical abilities - he's a trained soldier! The Doctor calls him a PE teacher because he assumed physical abilities is all he has.

Missy could be the Black Guardian

Well, she could.
But frankly she could be almost anyone.
Why do you think she's the Black Guardian?

Even trained soldiers aren't that good he must have jumped at least 15 feet into the air as I said even someone who won gold at the Olympics for that kind of thing could not have pulled that move off.

I thought missy is somehow related to the Tardis but the 'chosen well' line doesn't really fit as the Tardis hates Clara I thought.

So it's someone who Chose Clara and considers The Doc as her boyfriend.

Help me out here - where is that symbol?

I can see the big window over her right shoulder, and the smaller window in the door over her left shoulder, and the design on her "brooch" might be the head and shoulders of a Deadly Assassin era Time Lord, but I can't make out a Cyberman logo.

Oh, and in the curiouser and curiouser department - last week someone picked up on a scene where the image of Clara seemed to have been flipped for no apparent reason.

This time, there were a couple of times when we saw Clara in the mirror but the image wasn't flipped. I'd put that down to carelessness (or at the very least, not thinking that it mattered) if it wasn't for the fact that the Doctor might have been responding to it.

Surely Missy was "the woman in the shop" and by giving Clara the Doctor's number, she effectively chose her to be his new companion for reasons as yet unknown.

Here's a totally wild theory.

Missy is a Dalek agent. Clara is also a Dalek agent, but doesn't realise it yet.

Just remembered that Terry Nation used to write about white featureless rooms in the first Dalek stories. Judging from what we've seen of the Nethersphere so far...

Is Steven Moffat being a bit too clever thinking that no one has spotted it yet?

Well as far as half baked theories on these boards...it's not bad!

I think the woman in the shop was River Song in The Bells of St John, but since Deep Breath the woman in the shop was Missy

Well its not definitely a Cyberman symbol, but its been postulated it looks a lot like a CyberEye - see here, thanks to CD93 for sharing:

http://forums.digitalspy.co.uk/showt...=#post75262139

Thanks - I can see the likeness now.

That thread also mentions the Doctor staring intently at the screen when it was showing the mirror image that wasn't a mirror image.

Nah, Clara would have recognised her in The Name of the Doctor.

True enough. I still think that the woman in the shop isn't who she was going to be at first, though.

Actually I am now starting to believe the woman in the shop was Doc 12 in disguise all along to make damn sure Clara meets Doc 11!

http://3.bp.blogspot.com/-dZEW400vrL8/UgaBTkEx5qI/AAAAAAABXKo/_8O_08YTa04/s1600/1.jpg

As for Missy she's probably just some deluded, creepy stalker who fantasied about being the most important person to The Doctor's life to the point she's actually made it a reality for herself! Poor Doc 12 is none the wiser.

I could see this working. Someone who the doctor refused to take on his tardis and she getting his own back

Well, we don't always remember the people we briefly meet in day-to-day life, but I would think River would have recognised Clara or made some comment about it in Name, since we know that's from a time after her death.

What if the 'PE' in PE teacher is actually an acronym? The Doctor seems to be quite insistent on calling Danny it

Any ideas what it could stand for?

(please don't say Prostate Examination teacher!)

Erm Physical Education I would imagine...

Come on you insect, join in the 'fun'! PE...could be Pointless Existence or Plotholes Explained or Pitful Expression or Pudding Eater or how about Puny Earthling?

Psychotic or Psycho Educator

Sorry. I am worthless. I am but an ignorant bug waiting to be crushed by the boot of the Ploterrati. Forgive me.

In my case I suppose its Poorly Educated