The Rani is a fictional character in the British science fiction television series Doctor Who. She was played by Kate O'Mara. The Rani is a renegade Time Lady, an amoral scientist who considers everything secondary to her research; she has been known to enslave entire planets such as Miasimia Goria in order to have a ready supply of experimental subjects and a place to carry out her experiments uninterrupted. Her major interest is in tinkering with other species' biochemistry — she was exiled from Gallifrey after some of her lab mice, as a result of an experiment, grew to enormous size and ate the President's pet cat, and according to The Master, "took a chunk out of him too". She was established as being the same age as the Doctor prior to revelations about the Doctor's age in "The Timele