What follows are a couple of excerpts from the interview:
E!: What was your reaction to finding out they wanted you back on the show?
JOHN GLOVER: It was a big surprise. When Kelly Souders and Brian Peterson called me and said, "Would you be interested in coming back?" I said, "How in the world could I do that? I must have been a pile of broken bones and organs all smooshed together—I got pushed out of a 30-story office window." But they found this quite interesting way and the episode is a lot of fun.
E!: Tell us a little about your four-episode arc. We hear you have some different family members this time around.
JOHN GLOVER: Yes, I threw my seed around a lot. [Laughs.] I've got an illegitimate daughter and I was the one who found Clark out in the cornfield. The Kents were home reading the Sunday paper or something. They were not out by the cornfield that day. So his name is now Clark Luthor.
E!: Talk about that father-son dynamic.
JOHN GLOVER: Clark is the son that Lionel always wanted. But in the episode, it's Clark Kent who wakes up in Clark Luthor's bed, and it takes him awhile to figure out what's going on—he's not who Lionel thinks he is.
E!: Any chance alterna-Lionel is a big ol' softie?
JOHN GLOVER: See, I believed in [the original Lionel]. I saw the love and the heart and the soul of that Lionel. He did such beautiful things for Lex; what other father, in a way to strengthen his son, would give his son shock treatment—twice! That's because he loved him so much. It was only to make him strong, you see? [Laughs.]
For the full interview, follow the link.