It’s hard to show flight and driving at the same time… And yeah, backgrounds are kinda lame for two reasons.  Reason 1: they’re in the Arctic.  Not a huge amount of scenery.  Reason 2: I don’t have a SketchUp of it.

Don’t worry, Chris has long underwear.  Looks like Matt has another similarity to his Time Lord namesake: resistance to cold.  Percy and Nikki’s coats have been seen before, as has Jorocks’.  I researched women’s coats for Sally’s; most of what Google Images gave me would not do very well in the “keeping warm” department in a Nebraska winter, let alone the Arctic.  (And yes, I’m aware that they would probably need heavier coats than that.  ARTISTIC LICENSE.)