A key issue noted for Debut of Joker's Bang! Flag Gun. Detective Comics #341 was published by DC Comics on July 1, 1965, as part of a series that began in 1937. Gardner Fox and John Broome write, and art comes from Carmine Infantino, Joe Giella and Joe Kubert. This 36-page issue features Batman, Dick Grayson, Joker, Elongated Man and Sue Dibny.