Patricia McPherson (born November 27, 1954 in Oak Harbor, Washington) is an American actress. She is most well known for her role in the 1980s hit TV series Knight Rider as Bonnie Barstow, KITT's mechanic. She appeared in season one and was absent from season two, but she was subsequently asked to return to the show, which she did in the season-three opener, remaining from 1984 until the end of the series in 1986.
Today, Patricia McPherson is very active conserving wildlife and the forests; her efforts have included helping in attempts to preserve the Ballona Wetlands in southern California and working with the Ballona Wetlands Trust to sue the Playa Vista community for failure to take action concerning methane.
She retired from acting in 1991, although she made a cameo appearance as a Regent in the Syfy television series Warehouse 13 (season 1, episode 10) in 2009.