Martha (robot)

The Martha series of robots were robots created by The Doctor to do housework. He went to the United States of America in 1971 to sell them, and they soon became widespread. The Quarks seized control turned them against the Human race as a prelude to an invasion of America.

The Doctor was able to regain control of the Martha's and had them battle the Quark forces across the nation, leading to the alien's defeat. (TVC: Martha the Mechanical Housemaid)