She's a dangerous opponent while she holds the kryptonite.
— Clark Kent (Kirk Alyn)
3 seconds sound clip from Superman (1948) - Superman To The Rescue (Chapter 8).
You can hear this line at 00:04:26.978 in the Blu-ray version of the episode.
Quote context
[...]
- You helped too, Lois, with your police whistle.
- Well, I'll admit I didn't cover myself with glory, but I did learn one important fact.
- I gathered from what one of the men said, Dr. Hackett is working on a plan to steal a reducer ray.
- That's a big order, since the government is guarding it.
- That wouldn't stop the Spider Lady.
- She's a dangerous opponent while she holds the kryptonite.
- Your method of using the kryptonite against Superman is clumsy and stupid.
- No doubt you have a better method, Dr. Hackett.
- No, I haven't yet, but I hope to.
- That would be interesting. If you can do it.
[...]