She is present when the Fourth Doctor falls from the Pharos Project radio telescope and regenerates into his fifth incarnation , and continues to travel with the doctor Eventually , the chaos during the events of Resurrection of the Daleks prove too much and she chooses to leave the Doctor and Turlough and stay in 1984 London . She is present when the Fourth Doctor falls from the Pharos Project radio telescope and regenerates into his fifth incarnation , and continues to journey with the Doctor and his other companions .