Andrew Clarkson was the head of Dinosaurs in his brother Zoltan Clarkson's company. He showed the Second Doctor the Globe which contains a balanced ecosystem. He told Polly Wright that he wasn't good with people. He tried to undo what had happened to his brother but instead brought him into the computer programme which control the globe. Polly told him that he needed to trust himself to work out a solution. (AUDIO: The Curator's Egg)

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