Pat O'Brien (born William Joseph Patrick O'Brien) was an American stage, screen, radio, and television actor. He was a star during the first several years of his film career, the height of his popularity being during the 1930s and 1940s.
Billionaire Bruce Wayne has been fighting crime in Gotham City as Batman for some time when this film starts, but is an enigma to a city unsure of both what he is and whether he even actually exists or if he's just an urban legend. The plot here chronicles his battles with Jack Napier, a mob enforcer who goes insane after falling in a vat of chemicals and terrorizes Gotham as The Joker.
