Carolyn Martens is a fictional character from the television series Killing Eve. She works as a high-ranking officer in the British intelligence agency, MI6. Known for her intelligence and resourcefulness, Carolyn plays a crucial role in the pursuit of the skilled assassin, Villanelle. In the series, Carolyn is portrayed by actress Fiona Shaw. Her character is often seen navigating complex relationships and moral dilemmas, showcasing a blend of wit and determination. Carolyn's strategic thinking and experience make her a key player in the unfolding drama of the show.