Dialogue That is Solely for the Audience

I'm watching S3E20 (Enemies Foreign and Domestic), and Fitz is breifing the President about a nuclear reactor that Russia is building in Iran. He and Leo explain to the President the difference between a light VS heavy water reactor. We're supposed to believe that Bartlett, a 4th year president who has gotten well over 1,000 daily security briefings at this point, doesn't know that a heavy water reactor is used to make weapons grade nuclear fuel.

I get that this dialogue is for the audience, but it got me thinking about all the other "for the audience" lines in the show (e.g. Laurie, a law student, not knowing what POTUS means).

What are some of your favorites, or ones that you think are a little too obvious?