Jacqueline Hill
Grace Jacqueline Hill was a British actress known for her role as Barbara Wright in the BBC sciencefiction television series Doctor Who. As the history teacher of Susan Foreman, the Doctors granddaughter, Barbara was the first Doctor Who companion to appear onscreen in 1963, with Hill speaking the series first words. She played the role for nearly two years, leaving the series in 1965 at the same time as fellow actor William Russell .
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Source: Wikipedia