- Still, the best laid plans of mice...
- And men.
- What?
- And men. The best laid plans of mice and men.

7 seconds sound clip from The Hitchhiker's Guide to the Galaxy (1981) - Episode 4 sitcom.

You can hear this line at 00:24:45.766 in the Blu-ray version of the TV Series.

Quote context

[...]

- Yes, sir. Thank you very much.

- Well... Goodbye, Earthman. Sorry about your planet. Hope the lifestyle comes together.

- Now, to business!

- Oh, yeah, to business!

- To business!

- I beg your pardon?

- I'm sorry, I thought you were proposing a toast.

- Now, Earth creature, we now have been running your planet for the last ten million years in order to find this wretched thing called the Ultimate Question.

- Just as we were about to see the fruit of millions of years of work, you go and let your planet get blown up!

- Still, the best laid plans of mice...

- And men.

- What?

- And men. The best laid plans of mice and men.

- And what have men got to do with it?

- Listen, we've got to have that question!

- Well, I'm sorry, I can't help you. Shall we be off?

- Hey, get this, will you, Earthman. You are a last-generation product of that computer matrix, right? I mean, you were there right up to the point when your planet got the finger, yeah?

[...]