Big Jack Bancroft

A ruthless gangster, "Public Enemy Number One," who attempts to hide from the police by having his men kidnap saxophonist Eddie Blinn, whom he resembles, and then taking Blinn's place in Kay Kyser's famous band. For a time, Bancroft eludes capture, but he is ultimately apprehended by members of the Gotham City Police Department through the heroic efforts of Batman, Robin, and bandleader Kyser.