Julie Barnes is a fictional character from the television series The Mod Squad, which aired from 1968 to 1973. She is portrayed by actress Peggy Lipton and is one of the three main characters in the show. Julie is a young woman who becomes an undercover police officer, working alongside two other agents, Linc Hayes and Pete Cochran, to tackle crime and social issues in the 1960s. In the series, Julie is depicted as a strong and resourceful character, often using her intelligence and charm to navigate challenging situations. Her role reflects the changing social dynamics of the time, particularly regarding youth culture and the fight for civil rights.