Plumes of fire lit the sky. Molten lava scarred Krypton's surface.

6 seconds sound clip from Superman (1948) - Superman Comes To Earth (Chapter 1).

You can hear this line at 00:02:30.167 in the Blu-ray version of the episode.

Quote context

[...]

- Among the leaders was Jor-El, the foremost man of science.

- Jor-El had concluded that Krypton was being inexorably drawn towards its sun, and would one day explode like a giant bubble and disintegrate.

- Jor-El's wife, Lara, inspired him in his feverish race to construct a trial spaceship.

- If successful, he planned to build a mammoth fleet to carry the inhabitants of the doomed planet to safety on Earth.

- Now, giant subterranean pockets of gas exploded, touching off long-sealed volcanoes.

- Plumes of fire lit the sky. Molten lava scarred Krypton's surface.

- The fears of Jor-El and Lara were intensified by their concern for the safety of their infant son.

- To Jor-El, the tremors and shocks, which were now more frequent and violent, were an indication that the cataclysmic day was not far off.

- Yielding to Jor-El's urgent demands, Ro-Zon, leader of the council, summoned his colleagues in emergency session.

- Members of the council, we're all well-aware of the phenomena that Krypton has been experiencing the past few weeks.

[...]