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)
The Clock King Gets Crowned (2) - S2-E12
Factual error: Trapped in the overturned hourglass, Batman and Robin lie flat and begin furiously digging in the sand, making the hourglass roll out the door. But to cause such rapid movement, they'd need to be applying their weight against one of the glass sides (like a hamster in a ball). Just digging in the sand wouldn't get them anywhere, at least not that quickly. (00:04:15)
The Joker's Provokers (2) - S2-E22
Factual error: Tsk. After all his lectures to Robin about the importance of education, Batman should and would know better. On the chalk board, where he's written out Joker's message (dictated to him over the phone), the caped crusader mis-punctuates the phrase "a gargoyle's key" by leaving out the apostrophe. Definitely not a mistake that stickler-for-correctness Batman would make. (00:09:30)
The Joker's Provokers (2) - S2-E22
Factual error: During the fight to regain his box, the Joker picks up an orange colored deep well drill bit to hit Batman. First, such a device has sufficient weight that one regular man couldn't lift it easily, let alone swing it. Second, the drill bit wouldn't be lying around in the water works guard office.
The Bat's Kow Tow (2) - S2-E30
Factual error: Batman ingeniously deduces that the sympathetic vibration needed to escape Catwoman's sound-trap is the note F-sharp above high-C. What he proceeds to hum, however, is a D, and Robin hums an E. Neither of them reaches F-sharp, but the sound chamber dutifully explodes and frees them anyway. (00:02:30)
The Penguin Declines (3) - S2-E39
Factual error: Joker, Penguin and no less than four henchmen all manage to hide in the Batmobile's trunk and leap out when it enters the Batcave. Even for Batman, this is stretching credibility more than a bit. There's no way the Batmobile's trunk could hold six adults and still close (and it was closed). Two might fit, even three in a pinch - but not six. (00:17:30)
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