And return we must. For on Venus important minerals were discovered that would be a vast benefit to our own civilization.

7 seconds sound clip from the 20 Million Miles to Earth (1957) movie soundboard.

You can hear this line at 00:30:48.249 in the Blu-ray version of the movie.

Quote context

[...]

- He died here after the ship crashed.

- Fascinating. Horrible, but fascinating.

- Now, on that ship was a particular sealed metal container.

- In it is an unborn specimen of the animal life on the planet. We've got to find it.

- Our task is to discover in what physiological way life is able to survive and to flourish there.

- Not until that secret is learned can another expedition expect to return.

- And return we must. For on Venus important minerals were discovered that would be a vast benefit to our own civilization.

- I'm at your disposal, general. In what way may I assist you?

- We need divers, several divers to descend to the wreck to search for the specimen.

- They will be here in the morning.

- Don't you want me to drive for a while?

- No. No, cara, non sono stanco, grazie.

- Buona fortuna.

- Grazie.

[...]