- Look. I hate to ask this, but what exactly am I doing here?
- Simple. I rescued you from the Earth.

7 seconds sound clip from The Hitchhiker's Guide to the Galaxy (1981) - Episode 1 sitcom.

You can hear this line at 00:30:28.092 in the Blu-ray version of the TV Series.

Quote context

[...]

- Most leading theologians claim that this argument is a load of dingo's kidneys.

- But this didn't stop Oolon Colluphid making a small fortune when he used it as the central theme for his best-selling book, Well That About Wraps It Up for God.

- Meanwhile, the poor Babel fish, by effectively removing all barriers to communications between different cultures and races, has caused more and bloodier wars than anything else in the history of creation.

- Hey, Ford. This towel's moved.

- Yes. That's a six-light-year jump.

- Good. That means we' re near Bernard's Star. We can jump a ship there.

- Can we?

- Look. I hate to ask this, but what exactly am I doing here?

- Simple. I rescued you from the Earth.

- Well, what happened to the Earth?

- It's been disintegrated. Has it?

- Yes. It just boiled away into space.

- Listen, I'm... I'm a bit upset about that.

- Oh, well. All gone? Nothing left?

- What about the book? Maybe the book's got something...

[...]