John Victor Shea III is an American actor and director who has starred on stage, television and in film. He is best known for his role as Superman's arch-nemesis Lex Luthor in the 1990s TV series Lois & Clark: The New Adventures of Superman and his starring roles as Adam Kane in the sci-fi TV series Mutant X and Hank Zaret in the short-lived 1990s TV series WIOU.

For Disney, he played Dr. Charles Hendrickson in Honey, I Blew Up the Kid.