Thanks to
IGNfor giving the news about John Schneider's return in "Smallville." This is what ign.com had to say:
"Obviously Jonathan's return raises some questions, given that the character died back in Season 5. I can't reveal yet the how and why of Jonathan's appearance, but I can tell you that we'll see him in the season premiere, entitled "Lazarus." In addition, Schneider is expected to appear in at least one other episode as the season continues."
Jonathan Kent was the husband of Martha Kent and the adoptive father of Clark Kent, and ran their farm. Jonathan died of heart failure on January 26, 2006, the night he was elected Kansas State Senator. Jonathan was a farmer his whole life; as a result, he had a strong work ethic and very high moral values. He believed people should be honest, ethical and, like himself, upfront and sincere. Jonathan was a firm but caring father. He was extremely influential in helping Clark adjust to his abilities and cope with being different. He died in the fifth season's episode, "Reckoning."