Dracon's hair was all dark in "Deadly Force". Now there's a streak of white in it. The writers said this was because his first encounter with the Gargoyles scared him so much his hair turned white.
The first episode in which all the members of the Manhattan Clan do not appear. Broadway is the only one who does.
Elisa is shown to now keep her sidearm in a lock box, in a drawer, having learned her lesson in Deadly Force, where she simply left it in its holster, hanging from a coat rack. (Indicated by her brief glance at Broadway when she retrieves it)
Broadway has learned to read by this point but still has trouble.