Best Investigation movies of 1973

Actors : Dyan Cannon, Joe Santos, Burt Reynolds, John P. Ryan,
Directors : Buzz Kulik,

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 ...

Actors : Robert Lang, Laurence Harvey, Billie Whitelaw, Elizabeth Taylor,
Directors : Brian G. Hutton,

Ellen Wheeler, a rich woman, is recovering from a nervous breakdown with the help of her husband and a good friend. One day, while staring out the window, she witnesses a murder. But does ...

Actors : Anjanette Comer, Marianna Hill, Ruth Roman, Susanne Zenor,
Directors : Ted Post,

A social worker, still reeling from the loss of her architect husband, investigates the eccentric, psychedelic Wadsworth Family, consisting of a mother, two daughters, and an adult son with the apparent mental capacity of an infant.

Actors : Martin Balsam, Charles Bronson, Paul Koslo, Jack Colvin,
Directors : Michael Winner,

A Los Angeles detective is sent to New York where he must solve a case involving an old Sicilian Mafia family feud.

Actors : Kurt Raab, Jeff Roden, Margit Carstensen, Ingrid Caven,
Directors : Ulli Lommel,

Story of a gay serial killer who murders young boys so he can serve them as dinner to his circle of fellow cannibals.

Actors : Donald Pilon, Jean-Louis Roux, Christopher Plummer, Karen Black,
Directors : Harvey Hart,

A detective investigating the death of a heroin-addicted prostitute uncovers evidence pointing to the existence of a murderous devil cult.

Actors : Yumi Kanei, Hiroshi Tsukata, Masakazu Tamura, Meiko Kaji,
Directors : Yasuharu Hasebe,

Once again on the lam, Matsu is helped by a strip club worker who holds a grudge against the detective who's trying to find her.

Actors : Jacqueline Bisset, Jill Clayburgh, Ryan O'Neal, Warren Oates,
Directors : Bud Yorkin,

A computer programmer decides to become a thief. And when he starts making waves an insurance investigator hounds him. He also meets a woman who becomes his accomplice.

Actors : Ewa Aulin, Klaus Kinski, Angela Bo, Sergio Doria,
Directors : Joe D'Amato,

A man discovers an ancient Incan formula for raising the dead, and uses it for a series of revenge murders.

Actors : Frederic Forrest, Al Lettieri, Robert Forster, Anthony Quinn,
Directors : Richard Fleischer,

After his mistress is savagely beaten up a Mafia leader goes after the killer with a bloody vengeance. Soon after the hunt begins, a gang war ensues.

Actors : Jon Finch, Sterling Hayden, Harry Andrews, Jenny Runacre,
Directors : Robert Fuest,

After the death of his Nobel Prize-winning father, billionaire physicist Jerry Cornelius becomes embroiled in the search for the mysterious "Final Programme", developed by his father. The ...

Actors : Verna Bloom, Henry Darrow, Eddie Egan, Robert Duvall,
Directors : Howard W. Koch,

After his suspension for the shooting death of drug runner, a New York City cop vows to keep the streets clean, any way he can.

Actors : Dana Wynter, Michael Burns, Jay Silverheels, Glenn Ford,
Directors : Gary Nelson,

A bounty hunter takes in the son of a man he killed.

Actors : David Bailey, Randolph Roberts, Scott Brady, Tiffany Bolling,
Directors : Richard L. Bare,

A tongue-in-cheek psycho movie in "Duo-vision." The entire feature employs the split-screen technique used in parts of Brian De Palma's "Sisters" that same year. As a handyman at a seacoast...

Actors : Victor Izay, Leslie McRay, Tom Pace, Lila Zaborin,
Directors : Ted V. Mikels,

Lorraine and Mark enter the world of witchcraft where Mara foretells the future and helps them remember their past lives. When a series of mysterious murders begin to occur, they turn to Dr. Helsford for advice.

Actors : Silvano Tranquilli, Luc Merenda, Carlo Alighiero, Richard Conte,
Directors : Sergio Martino,

When Milano police lieutenant Giorga's chief is murdered by an organized crime ring, he vows to avenge his boss's death. Going undercover to continue the chief's investigation, he plans to ...

Actors : Nancy Kwan, Ross Hagen, Roberta Collins, Maria De Aragon,
Directors : Robert Vincent O'Neill,

An insurance investigator battles Dr. Tsu and her sexy all-girl army.

Actors : Rosie Stone, Frank Bannon, Joshua Bryant, Linda York,

Two Los Angeles detectives are assigned to track down and arrest a brutal rapist-murderer terrorizing the city. Their job is complicated by the fact that the killer is able to avoid capture because he can pose as a woman.

Actors : Elsa Lanchester, Maurice Evans, Ray Milland, John Carradine,
Directors : Georg Fenady,

The murder of a Wax Museum proprietor and some other strange goings-on in the vicinity prompt a police investigator to determine whether the killer is one of the principles who wants to own...

Actors : Alice Arno, Norma Kastel, Jack Taylor, Lina Romay,
Directors : Jesús Franco,

A Whodunit from the great! The investigation into the suicide of a young woman found dead at the bottom of a cliff uncovers many lovers of both sexes, including her Brother's sister and her...