Helen, also known as Helen of Troy, was the wife of the Greek king Menelaus.
Helen was captured by the Trojan prince Paris. Menelaus challenged him to a duel, but Paris refused. The Greek army, under Menelaus' brother Agamemnon, began a war with Troy over Helen.
Ten years later, Menelaus was not interested in getting Helen back. He just wanted the war to end. However, the Greeks, with the help of the First Doctor, eventually defeated Troy and sacked it, retrieving Helen. (TV: The Myth Makers)