District Attorney Harvey Dent hides a deep dark secret--he has a second personality, Big Bad Harv, a tough gangster.

While engaged in a high-speed chase, the Penguin's gang escapes and the Batmobile is virtually demolished.

Crime boss Rupert Thorne forces his older brother, a doctor, to perform delicate surgery on Rupert--and kidnaps Dr. Leslie Thompkins to assist.

The Riddler appears to have gone straight when he develops a new and successful puzzle based toy.