While they've been trapped between floors in an elevator, the space man has told Helen his identity and purpose here.

8 seconds sound clip from the The Day the Earth Stood Still (1954) classic radio play.

You can hear this line at 00:39:49 in the radio play.

Quote context

[...]

- If it isn't all we say it is, your money will be returned.

- We pause now for station identification. This is the CBS Radio Network.

- The curtain rises on Act Three of 'The Day the Earth Stood Still,' starring Michael Rennie as Klaatu and Jean Peters as Helen Benson.

- All over the world, electric power has been neutralized on the stroke of noon...

- As a token of the space man's power and as a warning to the Earth.

- While they've been trapped between floors in an elevator, the space man has told Helen his identity and purpose here.

- I've already told you more than I told Professor Barnhardt, because my life, in a sense, is in your hands.

- But if I die, a world... your world... may die, too.

- Yes, I understand.

- I thought if you knew the facts you'd appreciate the importance of my not being caught before the meeting tonight with the world's scientists.

- Yes, of course. Of course I do.

- You hold great hope for this meeting, don't you?

- I can see no other hope for your planet. If the meeting should fail, then I'm afraid there is no hope.

[...]