A girl, sitting on her own in a small cafe in Rickmansworth, suddenly realised what it was that had been going wrong all this time, and she finally knew how the world could be made a good and happy place.

12 seconds sound clip from The Hitchhiker's Guide to the Galaxy (1981) - Episode 2 sitcom.

You can hear this line at 00:02:16.812 in the Blu-ray version of the TV Series.

Quote context

[...]

- And lots of the people were mean and most of them were miserable, even the ones with digital watches.

(HORNS HONKING)

- Many were increasingly of the opinion that they'd all made a big mistake in coming down from the trees, in the first place.

- And some said that even the trees had been a bad move, and that no one should have ever left the oceans.

- And then, one day, nearly 2000 years after one man had been nailed to a tree, for saying how great it would be to be nice to people for a change...

- A girl, sitting on her own in a small cafe in Rickmansworth, suddenly realised what it was that had been going wrong all this time, and she finally knew how the world could be made a good and happy place.

- This time, it was right. It would work, and no one would have to get nailed to anything.

- Sadly, however, before she could get to a phone to tell anyone, the Earth was unexpectedly demolished, to make way for a hyper-space bypass, and so the idea was last forever.

- Meanwhile, Arthur Dent has escaped from the Earth in the company of a friend of his, who has unexpectedly turned out to be from a small planet somewhere in the vicinity of Betelgeuse, and not from Guildford after all.

- His name is Ford Prefect, for reasons which are unlikely to become clear again at the moment,

[...]