Bruce Wayne disappears when Jim Gordon is still talking to him while facing away, like Batman always does in the comics.
"Pax Penguina," is Latin, which roughly translate to "Peace under Penguin's reign." It is a variation of "Pax Romana," "Pax Britannica," or "Pax Americana," which mean peace under the Roman or British Empire or under American oversight.
When Jim Gordon is being attacked by the other cops, the first punch is just before the scene changes to Penguin's new club in which the band playing gives a horn stab that is reminiscent of Batman (1966) throwing a punch *pow* style.
At 02:36, the robber's license has the "organ donor" box checked.
Erin Richards, Drew Powell, Maggie Geha, Benedict Samuel and Michael Chiklis are no longer credited as series regulars. Alexander Siddig now is.