Penguin Is a Girl's Best Friend (1) - S2-E42
Continuity mistake: After Batman and Robin fight off the fake thieves, when Penguin threatens the Dynamic Duo with jail time for aggravated assault and malicious property damage, in his closeup Penguin holds the megaphone in his left hand and his cigarette is in his right hand, but in the next wide shot those items have switched hands. (00:02:45)
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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