A key issue noted for Debut of Blackgate Penitentiary and First appearance of Blackgate Penitentiary. Detective Comics #629 was published by DC Comics on May 1, 1991, as part of a series that began in 1937. Kelley Puckett and Peter Milligan write, and art comes from Adrienne Roy, Jim Aparo and Michael Golden. This 36-page issue features Batman, Alfred Pennyworth, Batman Who Laughs, Stan Kitch and Hungry.