Catherine Cawood is a fictional character from the British television series Happy Valley, created by Sally Wainwright. She is portrayed by actress Sarah Lancashire and serves as a police sergeant in the West Yorkshire area. The show follows her as she navigates personal and professional challenges, including dealing with the aftermath of her daughter's tragic death. Catherine is known for her strong-willed personality and dedication to her job, often confronting difficult cases and complex moral dilemmas. Her character is celebrated for its depth and realism, making her a standout figure in contemporary British drama.