Season 6, Episode 24: "The Understudy"

I think Superman probably has a very good sense of humor.

I never heard him say anything really funny.

He's got super strength, super speed.

I'm sure he's got super humor.

Either you're born with a sense of humor, or you're not.

It's not gonna change.

Even if you go from the red sun of Krypton

all the way to the yellow sun of the Earth.