During Harvey's trial, the jury box is filled with cameo characters. Look for Talia Al Ghul, Thomas Wayne, and the drunken Gothamite from episode 1.
During the parade scene in episode 10, Zatanna is on a float and Killer Croc is hidden in the crowd wearing the same disguise he used to impersonate Detective Bullock in "Batman: The Animated Series."
Commissioner Gordon was voiced by 3 different actors throughout the first season before settling on the chameleon of voice actors, Joel Morales.
Episode 1 (Teknek Flozart) Episode 2 (Coulter Rail) From 3 to infinity (Joel Morales)
Episode 1 (Teknek Flozart) Episode 2 (Coulter Rail) From 3 to infinity (Joel Morales)
In episode 4 there are 2 cameos from New 52 characters. "Nobody" and "The Court of Owls."
Gordon's area code, that's displayed on the Batmobile dash screen, is from Boston.