Fine Feathered Finks (1) - S1-E3
Other mistake: If the camera in the Penguin's cell is hidden and stationary, then the video taken from the cell should all be from the same angle, but not only does much of it move along with the Penguin as he paces, it also is much closer and at a lower angle. It only reverts back to being hidden when he notices it.
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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