Anton Mordillo
Anton Mordillo was an alien who was sold into criminal slavery at birth. The slavery organisation was the Thieves Guild of Kardol. Mordillo was framed for a crime he didn't commit in the Habius Galaxy. He escaped and fled through Earth. He disguised himself as a human and became one of the world's greatest tenors. The Tenth Doctor visited Puccini's grand opera Turandot at the Vienna State Opera. Anton Mordillo was the star of the opera. The Doctor knew about the Thieves Guild of Kardol and thought Mordillo was still a member. When he heared that Mordillo was just a slave and did not commit any crime he wished Mordillo good luck and left. After the Doctor left Mordillo wanted to give a concert at the Sydney opera house. (COMIC: The Great Mordillo)