Near the end, Thomas Smithers reveals to his wife that Chrome was an impostor. How did he come to know this? Maybe I missed something.
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Gentlemen, you can't fight in here! This is the War Room!"--Pres. Merkin Muffley
When he left for the city to go to his business his wife asked him to stop by mr. Larosse business to discuss the tropical plants for their greenhouse. When he got there he saw the place of business was empty and in shambles. He put two and two together.
shareOh man, I wish I still remembered this movie well enough to take on your answer. What I do remember is that it isn't worth re-watching!
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Gentlemen, you can't fight in here! This is the War Room!"--Pres. Merkin Muffley