This may be in Amazon Women on the Moon. A Scientist explains something to a General, and then repeats the explanation nearly verbatim to a Lady Reporter. General: "Now how about explaining it to me again." Scientist: "No, I think the audience have got it by now." —Tamfang

I'd like to suggest a possible new subcategory: The "Needs No Introduction" introduction, when a character is presented with something like "X is so famous they need no introduction! I've known X since we studied together at [Prestigious Educational Establishment]..." and proceeds to give them the introduction they allegedly don't need...