Learning that the Reducer Ray machine is to be taken to Metropolis, the Spider Lady plots to steal it. Clark Kent accompanies the truck, which is used as a decoy. But now the Spider Lady is informed that the machine is coming by train, and...

14 seconds sound clip from Superman (1948) - Irresistible Force (Chapter 9).

You can hear this line at 00:00:54.456 in the Blu-ray version of the episode.

Quote context

[...]

- Turn these men over to the police.

- This ray will set it off just ahead of the train.

- Will the vengeance of the Spider Lady again menace Lois Lane?

- Will her desperate call for help go unanswered?

- For the stirring answers, see Irresistible Force, chapter nine of Superman, at this theater next week.

- Learning that the Reducer Ray machine is to be taken to Metropolis, the Spider Lady plots to steal it. Clark Kent accompanies the truck, which is used as a decoy. But now the Spider Lady is informed that the machine is coming by train, and...

- There's the car, but what's goin' on?

- Looks like our men lost out too.

- Well, we can fix that.

(Police siren wail) Cops!

[...]