At the Spider Lady's hideout, Professor Leeds' assistant, Morgan, has revealed the fact that Superman is vulnerable to the meteoric kryptonite. He is then disposed of.
10 seconds sound clip from Superman (1948) - A Job For Superman (Chapter 5).
You can hear this line at 00:00:54.187 in the Blu-ray version of the episode.
Quote context
[...]
- I might take the risk if you weren't a newspaper reporter.
- Did you think we wouldn't go through your handbag?
- Is Clark Kent utterly unaware of Lois' fate? Can even Superman arrive in time to save her?
- Don't miss A Job for Superman! The fifth smashing chapter of Superman, at this theater next week.
- The Spider Lady now considers the fate of her other prisoner, Lois Lane.
- I don't plan to finish her here. I just want her to realize my power.
- You're not gonna turn her loose?
- Thanks.
- Not bad. I have no complaint about the way you handled the problems of the lovelorn. Very tactful.
[...]