The Secret Code Season 7, Episode 7

Jerry

Actually, that's the definition of selfish.

George

Have you ever given your code to anyone?

Jerry

No one's ever asked. You want it? It's 'Jor-El.'

George

Superman's father on Krypton.

Jerry

Of course. C'mon Georgie, you wanna tell me. It's eating you up inside. Sing it, sister.