Joan Watson is a fictional character from the television series Elementary, which is a modern adaptation of the classic detective stories featuring Sherlock Holmes. In the show, she is portrayed as a former surgeon who becomes the apprentice and partner of Sherlock Holmes, assisting him in solving various criminal cases in New York City. Joan is known for her intelligence, resourcefulness, and strong moral compass. Throughout the series, she evolves from a medical professional to a skilled detective, often using her medical knowledge to aid in investigations. Her character adds depth to the narrative, showcasing themes of friendship and personal growth.