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A wealthy Texan named Sam Johnson (Harry Cheshire) offers to sell the Ricardos and the Mertzes some of his leftover oil stock. Suspecting that the stock isn't a valuable as it's cracked up to be, both Ricky (Desi Arnaz) and Fred (William Frawley) take a pass -- or at least, that's what they tell each other! Inevitably, both of the couples invest heavily in Johnson's oil wells, leading to another session of conclusion-jumping on the part of Lucy (Lucille Ball), who sets up her own "sting" operation to find out if Johnson is on the up-and-up.