Paley also has in its archives the original pilot episode of Jeopardy!, VTR 18-Mar-1964. Clips have popped up here and there on various x,000th J! episodes, as well as on the 2005 Behind the Scenes DVD. Interesting thing I recall: the Daily Doubles were originally hidden as a second clue; that is, Marjorie picks "Television" for $30, the clue is revealed and answered as normal. The DD is under that clue, available to the contestant who correctly responded to the first clue. No idea what would happen if the first clue was a Triple Stumper. I don't believe the DD was explicitly related to the initial clue, like the follow-ups on Win Ben Stein's Money.