Best Investigation movies of 1970s

Actors : David McCallum, Eric Server, Sandra McCabe, George Wyner,
Directors : Burt Brinckerhoff,

A pack of dogs go on a killing spree.

Actors : Yôko Shimada, Teruhiko Aoi, Mieko Takamine, Kôji Ishizaka,
Directors : Kon Ichikawa,

After the death of the Father , His family are gathered to share Inheritances , but suddenly a woman with a mysterious masked man arrive there , claiming to be the other wife of the man ...

Actors : Natsuko Yashiro, Tamaki Katsura, Yôko Azusa, Yuri Yamashina,
Directors : Yasuharu Hasebe,

Two restaurant employees begin a torturous and sexual killing spree after they accidentally kill a hitch hiker and find that murder and mutilation is their mutual aphrodisiac.

Actors : Tom Laughlin, Delores Taylor, E.G. Marshall, Teresa Kelly,
Directors : Tom Laughlin,

After a senator suddenly dies after completing (and sealing) an investigation into the nuclear power industry, the remaining senator and the state governor must decide on a person who will ...

Actors : Tiiu Leek, Christopher Lee, Daniel Pilon, Robert Vaughn,
Directors : Ed Hunt,

An advance team from a dying, far-off civilization seeks a new world to conquer and inhabit -- Earth!

Actors : Loye Hawkins, Cathy Davis, Patricia Fulton, Wanda Starr,
Directors : Rene Martinez Jr.,

Tough streetwise private investigator Al Connors, who works in Florida but originally hails from Harlem, is hired by the CIA to guard a visiting African princess. Moreover, Connors uses all...

Actors : Cameron Mitchell, William Gray Espy, Aldo Ray, May Britt,
Directors : Herb Freed,

May Britt plays a seemingly innocent farm girl convinced that her slovenly uncle (Cameron Mitchell) is the man responsible for the bloody scissor-murders of several local girls.

Actors : Christine Kaufmann, Fabio Testi, Ivan Desny, Jack Taylor,
Directors : Alberto Negrin,

A detective investigating the murder of a teenage girl begins to focus his suspicions on the three girlfriends of the victim, who call themselves "The Inseparables."

Actors : Harold Sakata, George Lazenby, Jim Kelly, Terry Moore,
Directors : Al Adamson,

The Pig has a plan to eradicate some people with a freeze bomb that instantly freezes people to death. It is up to Detective Ash to stop him and protect the woman with the secret to the ice...

Actors : Gwen Arment, William Metzo, Laura Misch Owens, Curt Dawson,
Directors : Jack Weis,

Police try to capture someone who is commiting ritual murders of women during Mardi Gras in New Orleans.

Actors : Charles Grodin, Joan Collins, Art Carney, Farrah Fawcett,
Directors : Richard C. Sarafian,

After a rich old man dies in a suspicious car accident in Acapulco, his widow wants his insurance company to pony up $5 million. A hotshot investigator Decker (Grodin) and a charming model (Fawcett) come in to check it out.

Actors : Leonora Fani, Jeff Blynn, Gianni Dei, Michele Renzullo,
Directors : Mario Landi,

In Venice a detective is on the trail of a killer who commits a double murder (a married couple) then more grisly killings occur. Sex, drugs, gore and perversions are ingredients of this sadistic and sleazy giallo.

Actors : Spede Pasanen, Vesa-Matti Loiri, Simo Salminen, Tapio Hämäläinen,
Directors : Spede Pasanen,

A scientist creates a fully grown test tube baby from the cells of a mathematician, and the two are frequently mistaken for each other by gangsters, private investigators, the police, and the baby's creator himself.

Actors : Robert Mitchum, Mike Connors, James Franciscus, Jaclyn Smith,
Directors : Ted Post,

A woman is convinced by her lover to poison her cruel husband, a rich businessman. However, she becomes terrified when she finds the lover dead as well. A sinister PI, who's investigating her husband's disappearance, contacts her.

Actors : David Moses, Diana Davidson, Toni Jannotta, John Stinson,
Directors : William Malone,

An ex-cop, now working as a hack novelist, is called out of retirement to help investigate a string of deaths that appear to be the work of a serial killer but soon are revealed to be the ...

Actors : Cameron Mitchell, Faith Clift, Marc Lawrence, Richard Moll,

Police detective, Mitchell, investigating the death of a victim of a Nazi concentration camp discovers a nightclubbing playboy who has strange powers over women and is seemingly ageless.

Actors : John Wood, Dudley Sutton, Sammy Davis Jr., Peter Lawford,
Directors : Jerry Lewis,

Two night club owners find themselves in trouble with the law. One of them goes to his English Lord brother for help, and the Lord is later murdered. He swaps places with his dead brother to solve the murder.

Actors : Joan Collins, Judy Geeson, George Peppard, Oskar Homolka,
Directors : Sam Wanamaker,

A British intelligence agent must track down a fellow spy suspected of being a double agent.

Actors : Gayle Hunnicutt, Flora Robson, David Hemmings, Wilfrid Hyde-White,
Directors : Richard C. Sarafian,

Reformed drug addict Tim Brett is holidaying in Italy with his aunt. When she is murdered, he tries to investigate, and soon his whole life is out of control.

Actors : Luanne Roberts, Buddy Pantsari, Julie Conners, John Alderman,
Directors : Jonathan Lucas,

A private detective journeys to Africa to find a legenday white gorilla. The gorilla turns out to be an escaped Nazi war criminal.