Kate O'Mara is an English film, stage and television actress. She is best known for playing Alexis Colby's scheming sister, Cassandra "Caress" Morrell in the hit 1980s TV series, Dynasty. She also played the Rani in Doctor Who, and Laura Wilde in Howards' way.
O'Mara also appeared in Absolutely Fabulous as Jackie Stone and also starred in Crossroads as Lady Alice Fox. In 2008, O'Mara made a one-off appearance in BBC1's daytime soap opera, Doctors as Rosetta Froom.
She also appeared in other televison shows such a: Z-Cars, Bad Girls, Family Affairs, The New Adventures of Robin Hood and so on.