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)
Smack in the Middle (2) - S1-E2
Factual error: Nitrous oxide is not flammable. Not to mention, if it were, Riddler would have risked blowing everything up when he shot the gun in the room saturated with it just to give his henchmen the signal.
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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