Without the crackle of the Doctor and Clara getting to know each other, a huge bizarro world to explore, or a high-stakes, complex story, "Cold War" left me a little cold.
The submarine's depth gauge is labeled improperly; the dial lists the units as "METEPC", or the word "METERS" transliterated into Cyrillic characters, rather than translated into Russian. The Russian word for "meters" is "метров," or "metrov" when transliterated into Roman characters.
When the submarine surfaces, breaking the ice cover, the diving hydroplanes on the sail are in the horizontal position. All submarines with hydroplanes on the sail rotate it to the vertical position before breaking the ice cover. The edge of the hydroplanes are reinforced and angled for this purpose.
The bridge console shows high definition flat-screen plasma displays. In the early 1980s, the equipment used would be CRT displays.
When the sub is resting on the ridge at 700 meters (2300 feet) depth, the missiles can not be launched. The maximum launch depth for the Delta III/IV submarines are 55 meters (180 feet).
Trivia: The HADS (Hostile Action Defense System) is mentioned for the first time in the series since the 1968 serial "The Krotons."
Clara: Are we going to be okay?
The Doctor: Oh, yes.
Clara: Is that a lie?
The Doctor: Possibly.
The Doctor: A native of the planet Mars. And we go way back. Way back.
Zhukov: Martian, you can't be serious?
The Doctor: I'm always serious. With days off.
The Doctor: Skaldak won't talk to you. You're--you're an enemy soldier.
Zhukov: And how would he know that?
The Doctor: A soldier knows another soldier. He'll smell it on you, smell it a mile off.
Zhukov: And he wouldn't smell it on you, Doctor?
Clara: How'd I do? Was I okay?
The Doctor: This wasn't a test, Clara.
Clara: I know. But...
The Doctor: You were great, yeah.
The Doctor: Really.
The Doctor: Professor, I could kiss you.
Grisenko: If you insist.
The Doctor: Later.
Skaldak: My world is dead! But now there will be a second Red Planet. Red with the blood of humanity.
This episode sees the first appearance of the Ice Warriors since the original series' serial "The Monster of Peladon" in 1974.
UK: April 13, 2013 on BBC1
Australia: April 14, 2013 on ABC1
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