You must come with me. Great things are afoot.
3 seconds sound clip from The Hitchhiker's Guide to the Galaxy (1981) - Episode 3 sitcom.
You can hear this line at 00:24:40.963 in the Blu-ray version of the TV Series.
Quote context
[...]
- Isn't that rather unethical behaviour?
- Oh, is it? I'm afraid I'm a bit out of touch.
- Well, if you call it a robot. It's more like an electronic sulking machine.
- On second thought, leave it here.
- 'Bring it, leave it'... I think I 'll turn myself off.
- You must come with me. Great things are afoot.
- Come, come now, or you'll be late.
- Dent, Arthur Dent. Late, as in the late Dent, Arthur Dent.
- What an extraordinary person.
- Nothing.
[...]