Continuity mistake: As Tut prepares to re-animate the scarab beetles, his apothecary henchman stands to his immediate right, close enough to touch his shoulder. But when the shot cuts to a wider angle, the man is standing a foot away. (00:08:45)
Factual error: King Tut is said here to have been a 4th Dynasty ruler. Just as in the previous Tut episode, Egyptian history seems to have entirely escaped Batman's writers. They previously mis-identified Tut's namesake as a 14th Dynasty ruler, and this time around, guessed wrong again. In fact, Tutenkamen's brief rule was part of the 18th Dynasty. (00:03:30)
Other mistake: When Tut's henchman slowly reads that Bruce Wayne will donate his talking sphinx to the Black Museum at Scotland Yard from a newspaper, a close-up shows he is reading it upside down.
Continuity mistake: Tut's crocodiles are menacing in the close-up, but in the scene where Robin is over the moving ledge, the crocodiles are very fake.
Other mistake: The opening scene and dialogue with Bruce and Dick responding to Gordon's call is from The Curse of Tut.
Answer: There wasn't one singular city used. It was shot in and around various locations in California, plus on a lot of sets and backlots. Ex. Some scenes were shot in LA, some in Pasadena, some in Santa Barbara, etc.
TedStixon