Photo Finish (novel) is a detective novel by Ngaio Marsh; it is the thirty-first, and penultimate, novel to feature Roderick Alleyn, and was first published in 1980. Set in a millionaire's island mansion on a lake in New Zealand's South Island, it is the last of Ngaio Marsh's four New Zealand set novels - the others being Vintage Murder (1937), Colour Scheme (1943) and (1945).