Let's hope we're wrong.
1 seconds sound clip from Superman (1948) - The Payoff (Chapter 15).
You can hear this line at 00:03:23.848 in the Blu-ray version of the episode.
Quote context
[...]
- Help! Get us out of here! Come on, unlock this door! Unlock the door! Get us out of here! Help!
- All things considered, yes. Thanks to you, Superman.
- The target has been destroyed.
- Good. Stand by for the next job.
- If Hackett and Anton were killed by the Reducer Ray, there's a frightening situation we must face.
- Yes. That the Spider Lady is in possession of the secret of the ray machine.
- The only way she could've gotten it is through Graham.
- She may have forced him to reproduce the ray device.
- And how would you account for the destruction of the jail and the death of the two men?
- I don't know. I wish I could find another explanation.
- There's gonna be more trouble unless we do.
- I think it was a masterstroke, Driller.
- Well, we might have had use for Hackett, if not for Anton.
- Mm. They've outlived their usefulness.
[...]