Kate O'Mara (born 10 August 1939, in Leicester) is an English film, stage and television actress. She is perhaps best known for her role as Caress Morell, Alexis Carrington's sister in Dynasty. She also played the villain, The Rani in Doctor Who.
The series follows an alternate timeline spawned by the question "What if Doctor Who Wasn't Axed in 1989?". Each episode of the series focuses on a different season, as gradually, based upon the previous season, a vast and detailed lore is built up.