Continuity mistake: On the tombstone in the previous episode, Michael's date of death is 11.4.2005. But in this episode, when Linc goes to the graveyard to visit Michael's grave, his date of death is 11.4.2010. It is also a different grave from the original, as the original was in South America beside the beach, and here we are led to believe it is in New York. (00:50:50)
Continuity mistake: Season 4, episode 10 "Ben 10 vs. The Negative 10, Part 2": When the Forever King makes his announcement "Nothing will stop this little home-coming", he stands outside the Mount Rushmore base on bare soil. But in the scene where Max reviews the recording of this speech, all of a sudden we find the Forever King standing on a neatly tiled floor.
Continuity mistake: When Vorenus ask Eranus where his children are, Vorenus raises both his arms. When it cuts, they are down.
Continuity mistake: When Howard sees his ex in the jacuzzi, his glass has a little bit of alcohol in it. When he drops it and it shatters, the glass is empty.
Continuity mistake: When the kids in the chorus become possessed by the ghosts and run out of the room, Juniper is standing alone by the piano, still wearing the chorus robe. In the next shot, the chorus teacher is now standing next to her, and she is not wearing her robe.
Continuity mistake: Nero falls backwards as he angrily replies to the youngsters. He is not holding anything, but when we see him on the floor, he brought two bottles with him. (00:06:10)