Before his name became synonymous with treason, Benedict Arnold was a bonafide hero of the American Revolutionary War. At critical moments Arnold inspired the Patriots with his grit and determination and earned the admiration of George Washington. Despite his popularity and battlefield prowess, Benedict Arnold eventually broke bad. Mo talks with author Nathaniel Philbrick about the now-notorious military man’s twisty path to betrayal - and explores the surprising backstories of other villains including France’s Philippe Pétain and Satan.