Catrona (The Final Beginning)
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Catrona was a scientist and prospector. When Skaro reappeared, her and Silas' ship was dragged down.
A week later, Catrona and Silas found Celestin's TARDIS and met the Second Doctor, who planned to repair it to get them off of Skaro. They went to the Dalek City to find him, but Catrona was infected by Dalek particles and Silas was exterminated. Although Raven promised to give Catrona medical treatment, she was too far gone and her voice became that of a Dalek's. (AUDIO: The Final Beginning)
