Best Mystery Movies of 1973

A gunfighting stranger comes to the small settlement of Lago. After gunning down three gunmen who tried to kill him, the townsfolk decide to hire the Stranger to hold off three outlaws who are on their way.

"Dirty" Harry Callahan is a San Francisco Police Inspector on the trail of a group of rogue cops who have taken justice into their own hands. When shady characters are murdered one after another in grisly fashion, only Dirty Harry can stop them.

In an overpopulated futuristic Earth, a New York police detective finds himself marked for murder by government agents when he gets too close to a bizarre state secret involving the origins of a revolutionary and needed new foodstuff.

Inquisitive journalist Grace Collier is horrified when she witnesses her neighbor, fashion model Danielle Breton, violently murder a man. Panicking, she calls the police. But when the detective arrives at the scene and finds nothing amiss, Grace is forced to take matters into her own hands. Her first move is to recruit private investigator Joseph Larch, who helps her to uncover a secret about Danielle's past that has them both seeing double.

A team consisting of a physicist, his wife, a young female psychic and the only survivor of the previous visit are sent to the notorious Hell House to prove/disprove survival after death. Previous visitors have either been killed or gone mad, and it is up to the team to survive a full week in isolation, and solve the mystery of the Hell House.

After being run out of Las Vegas, Kolchak heads for Seattle and another reporting job with the local paper. It's not long before he is on the trail of another string of bizarre murders. It seems that every 21 years, for the past century, a killer kills a certain number of people, drains them of their blood and then disappears into the night. Kolchak is on his trail, but can he stop him?

A year after Sheila is killed in a hit-and-run, her multimillionaire husband invites a group of friends to spend a week on his yacht playing a scavenger hunt-style mystery game. The game turns out to be all too real and all too deadly.

A short Arizona motorcycle cop gets his wish and is promoted to Homicide following the mysterious murder of a hermit. He is forced to confront his illusions about himself and those around him in order to solve the case, eventually returning to solitude in the desert.

New York private eye Shamus McCoy likes girls, drink and gambling, but by the look of his flat business can't be too hot. So an offer of $10,000 to finds some diamonds stolen in a daring raid with a flame-thrower is too good to miss. His investigations soon get pretty complicated and rather too dangerous. At least along the way he does get to meet Alexis.