The Joker's Flying Saucer - S3-E24
Continuity mistake: Batman and Robin both leap into the Batmobile and roar out of the Batcave. But the stock shot used after that shows Batman alone in the car. (00:03:10)
The Joker's Flying Saucer - S3-E24
Character mistake: Vertigris tells Joker he planted a bomb in the Batmobile while it was parked in front of City Hall/Police HQ. Only in this instance, it wasn't. It was parked in the alley out back, the better to hide his bomb-planting from public view, so it's strange that he'd forget this. (00:08:15)
The Joker's Flying Saucer - S3-E24
Continuity mistake: Aboard Joker's flying saucer, Alfred and Batgirl are sitting three feet apart, then shoulder-to-shoulder, then apart again, depending on the shot. (00:20:50)
The Joker's Flying Saucer - S3-E24
Plot hole: A time bomb is placed under the dashboard of the Batmobile and goes off inside the batcave. Much of the batcave is ruined, including fallen I-Beams, but the Batmobile has no damage to it even though the bomb was planted in it.
The Joker's Flying Saucer - S3-E24
Other mistake: Just before the final fight scene, Alfred hits his head on the door of the spacecraft while exiting, kind of like the Storm Trooper in Star Wars, reacts for a second and then keeps going on with the scene as if nothing happened.
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