The screams came from this. We've been tricked.
2 seconds sound clip from Superman (1948) - A Job For Superman (Chapter 5).
You can hear this line at 00:14:41.247 in the Blu-ray version of the episode.
Quote context
[...]
- Be careful with that glass. If you touch it, you'll set off an alarm.
- Hurry up. We haven't got much time.
- The screams came from this. We've been tricked.
- Is Superman unaware of Lois' danger?
- Are the Spider Lady's men to escape with the kryptonite?
- See what happens in Superman in Danger! Chapter Six of Superman at this theater next week.
- Lois tries unsuccessfully to stop the men. And now, as they flee leaving her in deadly peril...
[...]