This thrilling movie is a genuine ripping yarn with intrigue , mystery , tension and outstanding twists plots . An agreeable all action seventies nostalgia trip , being fast paced and rightly developed . The picture is packed with a stuffed ragbag of drugs , heavy arms and cars . Seattle cop Lon McQ (aging Wayne , he was 66 when he played a cop for the first time) investigates the murder of his best friend , Stan Boyle (William Bryant) , and the corruption within the police department . McQ believes Manuel Santiago (Al Lettieri) is behind this killing . McQ is a peculiar cop who lives on a boat (this boat McQ lives on actually belonged to John Wayne) and using mercilessly weapons (introducing the MAC-10 submachine gun to the general public and creating a demand for it) against enemy . As defying the orders of his superior , Captain Ed Kosterman (Eddie Albert) , lieutenant McQ takes justice on his own hands , he resigns to track them down . McQ enlists the help of private detective "Pinky" (David Huddleston) and J . C. (Jordan Christopher) . Meanwhile , McQ becomes involved with a twisted intrigue filled with narcotics , corrupt people , big dope dealers , shotguns and traitors . McQ driving his car Brewster Green 1973 Pontiac pursues and shoots nasties , mobsters and corrupt police officers . Including an exciting and breathtaking finale car chase .

One of Duke's last movies with a more work modern day assignment than most . Stepping out of his ordinary Westerns and into the character of a Seattle police man , here Big Duke goes in search of revenge on the gangsters who killed his best friend . Although , it was originally intended as a vehicle for Steve McQueen , it was heavily rewritten for John Wayne . John Wayne starred in this film , along with Brannigan (1975) , because he missed out on starring in Dirty Harry (1971). Stirring film in which there are nail-biting action scenes , intrigue , blasts , suspenseful set pieces and a big star as well as an excellent plethora of secondaries such as : Eddie Albert , Colleen Dewhurst , Clu Gulager , David Huddleston , Al Lettieri , Roger E. Mosley , Julian Christopher , and Julie Adams . This thrilling film is just a rip-off of Bullit (1968) and Dirty Harry , taking parts here and there . Colorful and atmospheric cinematography by Harry Stradling . Including the spectacular ending sequence in which McQ (Wayne) and Lois (Diana Muldaur) driving along the coast , it was filmed on the Olympic Peninsula of Washington State ; there were filming delays when the beach was foggy . Original musical score by the classic Elmer Bernstein , including a catching leitmotif .

The motion picture was compelling and forcefully directed , thanks capable hands of filmmaker John Sturges , if not much continuity , though at the beginning he was opposed to the casting of John Wayne in the title role , due to the actor's age . This is the only movie westerns director John Sturges and westerns film actor John Wayne made together . The redoubtable John demonstrates his skill and mettle here . Sturges was a warlike genre expert (Great escape , Never so few , The Eagle has landed) and Western master (Gunfight OK Corral , Last train of Gun Hill , The law and Jake Wade , Magnificent Seven , Escape from Fort Bravo ). McQ rating: 6.5/10 , Acceptable and passable. It is like Dirty Harry done with a veteran Big Duke . Well worth seeing , the movie will appeal to John Wayne fans .