So the great Superman has come to the end of the trail. And to be sure that he remains helpless, I'll keep this kryptonite ready.
14 seconds sound clip from Superman (1948) - The Payoff (Chapter 15).
You can hear this line at 00:15:02.382 in the Blu-ray version of the episode.
Quote context
[...]
- I've got a map that'll show you the route to her hideout.
- Get it.
- When you wake up, you'll be at the mercy of the Spider Lady.
- Is the machine beamed to the Planet building?
- Yes, it is, but you're not going to activate the machine.
- Don't move one step further.
- Superman, you didn't succumb to the kryptonite!
- I expected you to have it handy. I'm wearing a protective lining of lead under my uniform.
[...]