- How will Superman know if we'd let Jimmy go?
- I'll tell him.
- How will you know?
- Well, you're going to take me to where you're holding Jimmy. I'll see you release him.
9 seconds sound clip from Superman (1948) - Into The Electric Furnace (Chapter 7).
You can hear this line at 00:12:04.383 in the Blu-ray version of the episode.
Quote context
[...]
- Very well, what do you want to know?
- Only that he'd agree to almost any terms to save Jimmy Olsen.
- Superman won't appear until you first turn Jimmy loose.
- You said he'd agree to any terms.
- How will Superman know if we'd let Jimmy go?
- Well, you're going to take me to where you're holding Jimmy. I'll see you release him.
- Remember one thing. If this is a trap you're fixing up, you're in it too.
- Will Superman definitely show up?
- All right. Keep your eyes straight ahead. Someone will take you there.
- Well? Our agreement was that you'd let Jimmy go.
- So I heard. But I didn't agree.
- Oh, but you must, otherwise Superman won't appear.
- I think he will. And on time as usual. And when he does, we'll give him a shot of this.
[...]