Krypton is uttering and finally doomed.

6 seconds sound clip from the The Adventures of Superman - The Baby from Krypton classic radio series.

You can hear this line at 00:02:21 in the radio play.

Quote context

[...]

- Krypton's foremost man of science is about to address a meeting of the planet's governing council.

- Attention. Attention gentlemen. Jor-L speaks.

- Members of the council... I have completed my solar calculations and much as I dread uttering these words, I have come to the conclusion Krypton is doomed.

- Gentlemen. Gentlemen. Gentlemen, hear him out.

- These internal quakes, we've been experiencing, these volcanic eruptions, tidal waves, gas escaping from giant craters, all point to one thing gentlemen.

- Krypton is uttering and finally doomed.

- One moment gentlemen, one moment. There is no cause for anxiety.

- I am certain Jor-L has made a mistake.

- True, we have had a few minor quakes and eruptions, but nothing very serious.

- There must be some error in your calculations, Jor-L.

[...]