T. James Harrington II and Brian O'Brien were school chums who goaded each other into the world of Mystery Men. Jimmy and Brian were both from obscenely wealthy families and had attended the same prep schools and collage playing football and polo together. They became lawyers together, but when Brian went to New York City to practice and eventually become district attorney Jimmy returned home to run the family business. Soon enough Jimmy moved to the big city and got back in touch with Brian. The two, having become both disgusted with the legal system and more than a little bored fell into masked crime fighting. They were the first and seemingly on a whim inspired an entire generation of heroes. Jimmy was killed by Mayor Kozer under the alias of Big Shot who stole his mask and wore it as a trophy. Brian would eventually kill the Big Shot.