Where on Earth is Carmen Sandiego?

Birds of a Feather (3x4)

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Somehow, the world's largest diamond, the Star of Africa, was stolen. The police are baffled and it's up to Zack and Ivy to figure this mystery out. They soon discover that one of Carmen's henchmen tried to double-cross her and keep the diamond for himself. With a little trickery of their own, the detectives recover the diamond.