Well, that's an interesting timey-wimey mix. Old planes. With Lasers. Arrows.
I wonder how these handmines keep their eyes clean without eyelashes. Huh, the hands sticking out of the ground and the kid standing their remind me of the Muse artworks for Absolution and Uprising.
Why would you need an acoustic corridor? They don't seem too far away from each other to need it to talk.
Oopsy, the Doctor is saving Davros! Hey, on the other hand maybe he's changing the future here and making it a bit better. Not that I'm hopeful enough to believe that will really happen. Sooo... eyes and Davros, I wonder if there's any connection/meaning there to the taxi eye he'll have on his head later.

Good thing I've only recently read about siphonophores, otherwise I'd probably be so confused about what seems to be a single organism calling itself a colony. ...Well, actually I'm still a bit confused about how these work.

Oh wow, we're finally seeing the Shadow Proclamation again!
Well, that was a short visit.

Will the return to Karn be equally short?
Yeah Doctor, what have you done? Did you save Davros and now he wants to be saved again? Or did you leave him in the handmines field and feels you owe him?

What, implying that Clara had made out with Jane Austen?

"News reader speaks in own language" Oh subtitles, way to be specific.

Seeing all the familiar places again makes me happy, but in the case of the Tower I'm reminded once again how Sherlock didn't shoot there. Looks like I'm still not over that one.
I'm just thinking that CNN (if it exists in the DW universe) must be having a field day. You know how they love things going wrong with planes.
I like that UNIT woman. Jac, apparently. Ha, I knew she looked familiar! She was a lawyer on Sherlock!
Huh, I didn't expect it to be Missy. With that beginning, I thought it would be Colony Sarff.

"Bong!" Gotta love the subtitles.
Oh, a female sniper. Halle-fucking-lujah!
Ooh, loving the non-sexualness of the Missy-Doctor relationship.
Well, I'm glad that a baddy is showing they're bad. Sometimes it can got lost, you know.

Oh, the Doctor playing an e-guitar. Encore! encore!
Dude!
Okay, this has been fun, it really has, but can we get to why the Doctor is supposedly dying?

Oh, so that's what Colony Sarff's face lines are for.

Oh god, not another one of those creepy Dalek humans!

Oh, Missy can sing? She should form a band with the Doctor!
I think I'm actually becoming fond of Missy.

Ah, and there is Four's speech and the wires he didn't touch together.

A hidden planet? OMG, are we on Gallifrey? Please not Skaro, although it would make more sense. But I just want Gallifrey back - that one's been in the works for 2 years now, dammit!

Aw, look at the Dalek with the old-school colors!

Huh, haven't seen that one coming. I know this is Clara's last season, but I doubt this one's her last episode.

Oh, Davros kid again - did the Doctor come back (How did that work without the TARDIS?) to save him, which results in Davros seeing compassion isn't so wrong and stopping the Daleks from killing Clara? Or will the whole episode have never happened? And then of course there's still the question of how little Davros got out of that mine field after the Doctor had abandoned him
"Exterminate!" - didn't see that one coming! Nor the cliffhanger (Although I should have seen it coming, because the episode titles pointed that way. Actually all of this season seems to be two-parters).