Paul Newman returns to his private detective role Lew Harper, following 1966's "Harper", in another murder-yarn adapted from a Ross Macdonald novel (wherein the lead character was named Archer). Transplanted from Southern California to the bayous of Louisiana, Harper is up to his aw-shucks smile in trouble while investigating a blackmail plot which involves his former lady-friend (Joanne Woodward), a Southern belle from a prominent New Orleans family living under the thumb of an oppressive matriarch. An intimidating letter soon turns to murder, and the suspects include: the woman's nubile daughter (Melanie Griffith), a wealthy fat-cat (Murray Hamilton), and even the police chief (Tony Franciosa, sporting an oddball walrus mustache). Strictly TV-detective stuff, polished by the classy cast and Gordon Willis' terrific cinematography. It looks good and goes down smoothly, but doesn't leave a trace of itself behind. ** from ****