Sophie Leigh Stone (born 1980 or 1981) is an English stage and television actress. She was the first deaf student to win a place at the British drama school Royal Academy of Dramatic Art (RADA). she is best known for her roles as Louise in Two Doors Down and Doctor Who as Cass. In 2022, she joined the cast of the new Acorn TV detective series The Chelsea Detective, playing the forensics officer Ashley Wilton. She continued to play that role in season 3 in 2025. (Via Wikipedia)