Trivia: Xanatos's tower is the world's tallest building according to MacBeth: "It wasn't hard to spot all those robots and gargoyles taking off from the world's tallest building".
Trivia: MacBeth and Demona were allies for thirty-seven years.
When the Weird Sisters join around MacBeth to make him sleep, Phoebe walks on his right but then she appears on his left.
When Xanatos is flying with his armor, its helmet's mouth moves when he speaks, but in the next scene it doesn't move anymore.
In the last scene of Part Three, the numbers on the computer were counting down, but in the beginning of this episode, when Bronx attacks Demona, the number are counting up.
Goliath: Death is never the answer. Life is.
Demona: The access code is "alone."
Xanatos: Goliath, we made a good team. You know, all this time I've wondered why I let you creatures live. Now I know. You come in handy, now and then.
Goliath: As do you, occasionally.
Demona: You tricked me! You had me under a spell! None of this was my fault. It was the humans, always the humans!
Canmore: So the rumors were true. MacBeth and the gargoyle were linked by sorcery. When one dies, both die. And I remain victorious. She betrayed MacBeth. It was only a matter of time before she would have betrayed us. A good thing we had the rest of her clan destroyed as well. Her kind was an abomination! They did not deserve to live.
Xanatos: Normally, I'd be fascinated by all this. But I need that access code to save my city.