1 Prof. Jones: Of all the challenges we've ever faced, this by far is the toughest.
1 Minnesota Jones: I agree.
2 Prof. Jones: I hate to say it, but I can't see us pulling it off in time.
2 Monty: We can't give up, dad!
3 Prof. Jones: I have no intention of giving up! But if only we had a dictionary!
3 Monty: Dictionary?
4 Prof. Jones: We're doing the Times crossword puzzle to kill the time until we land in Berlin.

That's the London Times of course, which first published a crossword in 1930, not the New York Times, which did not publish a crossword until 1942.

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2025-08-19 Rerun commentary: The Times cryptic crossword puzzle is notoriously challenging. Of course that's what they're talking about here, since the easier concise (1993) and quick cryptic crosswords (2014) weren't introduced until much later.