A Horse of Another Color (2) - S3-E5
Visible crew/equipment: The stunt rider doubling Penguin in the horse race is pretty easy to spot. He's younger and thinner (despite an obviously padded costume), and his nose is about two inches shorter. (00:18:00)
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)
It's the Way You Play the Game (2) - S2-E26
Visible crew/equipment: When Batman and Robin visit Laughing Leo's Used Car Lot, the side of the Batmobile reflects a whole row of big square studio lighting panels. (00:06:30)
It's the Way You Play the Game (2) - S2-E26
Visible crew/equipment: The Batmobile has just pulled away, and as Andy waves good-bye, the camera shadow can be seen moving rapidly offscreen at the lower lefthand corner of the frame. (00:04:25)
Marsha's Scheme of Diamonds (2) - S2-E24
Continuity mistake: In part 1, Marsha's prisoners included the mayor. Here, Batman rescues Robin, Gordon and O'Hara - but the mayor has disappeared. And oddly, no one mentions his ever having been there. (00:05:05)
The Yegg Foes in Gotham (2) - S2-E14
Continuity mistake: Just before Bruce Wayne tosses the grape to set it off, Egghead's miniature radar bomb moves to a different position on the floor all by itself. (00:04:00 - 00:05:20)
Batman's Satisfaction (2) - S2-E52
Continuity mistake: Britt Reid visits Bruce Wayne, and while sitting on the couch, stretches forward and places both hands on his knees. But in the next take, he's abruptly leaning back with his arms folded. (00:09:30)
The Clock King's Crazy Crimes (1) - S2-E11
Continuity mistake: Clock King renders the art gallery patrons unconscious with a high-frequency sound wave. As they fall, one of the men drops his hat. When they come to and get up, the hat has disappeared. (00:15:20 - 00:19:10)
Other mistake: After King Tut's men deliver the statue, it's referred to as a Sphinx. Even Batman says, "Rather good imitation of the 4th Dynasty's Sphinx at Giza." Problem is, the Great Sphinx of Giza is a reclining lion with a human head. The statue in Gotham's park is a ram's head atop a seated human body, resembling Egyptian God Khnum, and looks nothing like the Egyptian Sphinx. Bruce Wayne is a member of Gotham City Museum's Board of Trustees, which recently opened the new exhibit of Egyptian antiquities. (00:10:35)
The Penguin Declines (3) - S2-E39
Continuity mistake: When Joker's goons return from Operation Laundry Bag and finally release Penguin from the bag, Penguin's hat is secured on his head with an elastic strap, but this strap vanishes in the next shot. (00:04:30)
Continuity mistake: While Bruce Wayne is lying on a gurney at the back of the ambulance, in the wide shot of Tut's henchmen driving along on the street, there's a rearview mirror on the windshield and a single beacon light on the roof, but in the closeups the rearview mirror is gone and there are two beacon lights on the roof. (00:21:30)
Smack in the Middle (2) - S1-E2
Revealing mistake: While Riddler is with the unconscious guests at the Moldavian exhibit, in the basement of the Moldavian Pavilion the Mole Hill gang blow up the ceiling to create an entry to the exhibit, on the floor above. They lean two tall ladders at the side of the hole and climb up. When Riddler makes for an escape Batman follows him down below, and now we can see long metal brackets bolting the ladders to the floor for safety. (00:20:20 - 00:22:00)
Smack in the Middle (2) - S1-E2
Continuity mistake: When Fake Robin takes Riddler's wheel to drive, the shot cuts to the Batmobile. It appears that Robin is a passenger, but he is supposed to be Riddler's prison service.
Smack in the Middle (2) - S1-E2
Factual error: The mammoth is filled, according to the Prime Minister of the Republic of Moldavia, with "used postage stamps from ancient kingdom of Moldavia." Postage stamps are a 19th century invention, not something an 'ancient kingdom' would have used. (00:17:20)
The Penguin's a Jinx (2) - S1-E4
Revealing mistake: When the Penguin orders his hook to be fired, it barely moves, then suddenly takes off. If you look closely at the hook before it moves, the connecting wire used to pull it out of frame can be seen. (00:13:30)
Smack in the Middle (2) - S1-E2
Continuity mistake: During the fight, the breather Batman has disappears, but suddenly returns afterwards. (00:21:50)
Smack in the Middle (2) - S1-E2
Revealing mistake: After Batman tosses his Batarang up to get to Molly, the lifting wire attached to him is plainly visible.
I'll Be a Mummy's Uncle - S3-E23
Plot hole: After the rock falls on King Tut at the end giving him amnesia, Batman explains how the rock fell. He says Tut raised his voice three decibels above high C. Decibels are a measure of volume, while pitch is a measure of frequency: the two are not directly related. This mistake was done in other episodes of Batman also, such as when Joan Collins played the villain.
He Meets His Match, the Grisly Ghoul (2) - S1-E16
Factual error: Dick Grayson's mini-camera, which is sitting on the bar, takes several shots of the villains from impossible angles several feet away from its location. And though he conspicuously places the camera in plain view, the crooks never notice it. (00:10:40)
How to Hatch a Dinosaur (2) - S3-E9
Factual error: Gotham City's museum should brush up on its paleontology. Their sign claims the neosaurus egg is 40 million years old. A) Neosaurus lived in the early Permian period, 290 million years ago. And B) All dinosaurs were rendered extinct 65 million years ago, most likely by an asteroid strike. So 40 million years ago, there were no dinosaurs on Earth. (00:06:50)
Answer: It's wasn't unusual for multiple actors to play one character on this show. The villains on the TV Batman were played by guest stars, not regular cast members. George Sanders, Otto Preminger, and Eli Wallach played the part at various times. They may simply have only wanted to play the part once or twice, or they were later tied up with other projects, making it necessary to cast someone else. Other characters, like Catwoman, were also played by more than one actress.
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