John Glover guest stared in Season One of Smallville, but didn't join as a regular until Season Two. Born in Salisbury, Maryland, John is a noted actor in many fields, including movies, television and theater. One of his most memorable roles was playing the Devil in Brimstone, which is a show he would really like to see on DVD someday. John continues to actively pursue theater work and also participates annually in the Jack Glover Memory Walk, named for his father, to benefit the Alzheimer's Association, Greater Maryland Chapter. He also played the Riddler in Batman : The Animated Series and a man scientist in Batman & Robin so John Glover in no stranger when it comes to superheroes.