While at Leslie Thompkins's home, Bruce Wayne picked up The Caduceus, a book that contained the photographs and names of all the medical graduates from Thomas Wayne's, Leslie's and Matthew Thorne's year. The book had a caduceus sign on it with only one serpent instead of the traditional two. The Caduceus is often confused with the real symbol of medicine, the Rod of Asclepius.
The orderly who Batman struggles to fight slightly resembles Lucas from the episode Prophecy of Doom (1992).