In the interview, he says that the planet Krypton exploded in 1948.
9 seconds sound clip from the Superman (1978) movie soundboard.
You can hear this line at 02:00:05 in the Blu-ray version of the movie.
Quote context
[...]
- M, as in moron, Otis? No, no, no. It's N! N, as in Neanderthal, nincompoop, nitwit.
- Ladder, Mr. Luthor. Coming right up.
- I didn't see, because I I'm sorry, Mr. Luthor. I...
- Ooh!
- In the interview, he says that the planet Krypton exploded in 1948.
- Ridiculous little freak took three years in a rocket ship to get to Earth.
- Ergo...
- Ergo. Ergo, 1948, three years...
- Did you say he don't drink and he don't smoke?
[...]