David Warner (who I associate with an old fave show of mine which was called Three)! Singing XD. ♫ Ohhhhh, Viennaaaa! ♪

Did the TARDIS just take off without the Doctor and Clara?

Wow, Ice Warrior looking not much different from the Old-Who version. The captain's reaction to the Ice Warrior is Old-Who style too.
Hm, wouldn't electroshocking someone who's standing in water result in shocking everyone else who's also in this puddle? I'm assuming the metal floor should be safe somehow, because otherwise submarines would be a really dangerous idea.

Oh right, they're Russians, speaking Russian. So... is the TARDIS still there or why can Clara hear them in English?

Heh, the Doctor speaking via Clara. Yeah, remind me of my beloved Moriarty, you heartbreaking heartbreaker!
Ooh, will we get to see a naked Ice Warrior?

These hands remind me of Gremlin hands (also, surprisingly skinny creature without the suit - as far as I can tell from the little we get to see) and the clatter sounds remind me of Lost's smoke monster.

...And then David Warner says "polar bears" XD (hey, try pogo sticks and egg whisks instead of cattle prods). Only here's no counting to 5 against fear, there's singing.

And on to yet another fandom: the monster is in the wall. How Chamber of Secrets.

"Ultravox, do they split up?" XD
Nooo, not David Warner's character! Now I'm in suspense, Gatiss, thanks a lot! The sound when Skaldak call his suit, also reminds me of Smokie/Smokey.

5000 years ago we haven't only just begun leaving our caves. Stop teaching kids bullshit!

Ah, we finally get to see Skaldak's face.

Oh, the HADS is back?

I actually properly liked this episode, woo! So far it's the best of season 7b.