Best Investigation movies of 1970s

Actors : Cheri Caffaro, Richard Smedley, Patrick Wright, Laurie Rose,
Directors : Don Schain,

Cheerleaders and models are kidnapped & sold by a white slavery ring. Female agent is sent to rescue them.

Actors : Spede Pasanen, Vesa-Matti Loiri, Tapio Hämäläinen, Simo Salminen,
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 : Jacqueline Bisset, John Phillip Law, Sam Wanamaker, Christopher Plummer,
Directors : Peter Collinson,

Helen has been incapable of speech since seeing her husband die - will she become the target of a deranged serial killer targeting disabled people?

Actors : Jackson Beck, Pamela Gruen, Devin Goldenberg, Allen Garfield,
Directors : John G. Avildsen,

Private detective takes on a case and gets mixed up in murder, sex and blackmail.

Actors : Burt Lancaster, Morgan Woodward, Cameron Mitchell, Susan Clark,

An ex-con, once a cop, now working as security in a college, decides to investigate the murder of one of the students, a daughter of a senator.

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 : Johnny Sekka, Peter Cushing, Alexander Davion, Patrick Macnee,
Directors : Robert Hartford-Davis,

A group of friends search for a young English Oxford student who has disappeared whilst researching in Greece. They are shocked to find that, wherever he has been, certain unsolved murders ...

Actors : Elizabeth Taylor, Ian Bannen, Guido Mannari, Mona Washbourne,
Directors : Giuseppe Patroni Griffi,

Mentally disturbed spinster Lise experiences a series of bizarre encounters in Rome as she searches for someone to murder her.

Actors : Françoise Fabian, Franco Nero, Giancarlo Badessi, Pierluigi Aprà,
Directors : Damiano Damiani,

The latest success by film-maker Giacomo Solaris is a crime thriller about a judge who gets too friendly with the Mafia and is murdered. A resentful Sicilian magistrate orders the film ...

Actors : Christine Kaufmann, Ivan Desny, Fabio Testi, 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 : 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 : 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 : Berwick Kaler, Annabella Wood, Jane Hilary, John Miranda,
Directors : Andy Milligan,

A murderous barber and his equally psychopathic friend, a baker, hatch a plan whereby the barber murders people and the baker makes them into pies to be sold in his shop.

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 : Reatha Grey, Stan Kamber, Marlo Monte, Tiffany Peters,
Directors : Jamaa Fanaka,

A proud black man does time in jail where he is subjected to heinous experiments. Once released, he goes about extracting vengeance on those who put him in prison. This includes both ...

Actors : Leslie Caron, Mitchell Ryan, Alex Dreier, Warren Oates,
Directors : Paul Magwood,

A hardboiled aging private eye is hired to find and protect a missing government witness sought after by the gangsters. The witness is a beautiful French woman and even the cops can't be trusted. The case is tough, but so is Chandler.

Actors : Gloria Hendry, Sherry Jackson, Michael Heit, Robert Viharo,
Directors : Don Edmonds,

A bounty hunter in Los Angeles sets out to track down and stop a masked serial killer who murders women by using kung-fu moves.

Actors : Jennifer O'Neill, Robert Duvall, Patrick Magee, Donald Sutherland,
Directors : Tom Gries,

An insurance investigator romances a wealthy young beauty when he suspects she may be involved in fencing stolen jewels.

Actors : Linda Marlowe, Gary Hope, Sean Hewitt, Richard Monette,
Directors : Lindsay Shonteff,

A female private detective, Harriet Zapper, is hired by a rich old man to find his missing children, and becomes involved in counterfeiting and murder

Actors : Preston Pierce, Georgina Spelvin, Susie Ewing, Rosalind Miles,
Directors : Al Adamson,

A team of girls go on a killing spree across the country.