His voice work includes the determined government agent Kent Mansley in the animated film The Iron Giant. He also voiced Superman's father Jor-El in Superman: The Animated Series and subsequently a much older Superman in the Batman Beyond two part episode The Call. He has recalled great affection for these roles, saying that he enjoyed them because he was (and continues to be) such a fan of Superman and because they were in such contrast to his less than sympathetic on screen roles that he is famous for. He subbed for Burt Reynolds as Boss Hogg in The Dukes of Hazzard: The Beginning.