Things there should be a word for, part eleventy million and one: a word or cultural reference that's glaringly out-of-place in a story set in an entirely different world. Like "anachronism," only trickier to pin down. (N.B. if there is a word for this, and you know it, I will be forever in your debt.)
And in order for this post not to be a complete waste of time, I bring you a handful of Mad Men icons, all from ep 1.06 (caps from here). I feel like I should probably be apologizing for #3 -- so far the joke it references is a very private one -- but the idea was just too good to pass up. (To say nothing of the cap.)