Best Investigation movies of 1970s

Actors : Gunnar Björnstrand, Kjell Bergqvist, Halvar Björk, Lickå Sjöman,
Directors : Vilgot Sjöman,

Investigates and sheds light on various sexual identities and sexual peculiarities outside the accepted sexual norms.

Actors : David Reynoso, Pedro Armendáriz Jr., Susana Salvat, Enrique Rocha,
Directors : Julio Aldama,

In a spectacular manhunt, a band of outlaws race cross-country with a million dollars and a newly married couple.

Actors : Carol Kane, Harriet Andersson, Jon Finch, Ángela Molina,
Directors : José Luis Borau,

English scholar visits a small Spanish town in the Andalusian mountains to investigate the disappearance of another English scholar long ago. He learns of the legend of Sabina, a mysterious dragon woman who becomes his obsession.

Actors : Rajendra Kumar, Shailendra Singh, Bhavana Bhatt, Raj Kapoor,
Directors : Naresh Kumar,

Two bumbling, middle-aged private detectives, Dharamchand and Karamchand, are assigned to locate the missing daughter, Asha, of a multi-millionaire. Their adventures take them to a gangster...

Actors : Ron Hartmann, Alfie Scopp, Michael Kane, Cec Linder,
Directors : Douglas Jackson,

The investigation of a suspected tax fraud, based on actual case files of the Department of National Revenue.

Actors : Aruna Irani, Rekha, Nirupa Roy, Dharmendra,
Directors : Mohan Segal,

Vijay Kumar, a forest officer returns to the forest where his dad met an untimely end. Will his secret plan to snare poachers succeed? Sandalwood, ivory,animal hides and raw power is at the nexus of money and corruption.

Actors : Felton Perry, Robert Conrad, John Ashley, Don Stroud,
Directors : Eddie Romero,

When Ed Neilson's entire family is viciously murdered, he pleads with retired CIA operative Duke Smith (Robert Conrad) to investigate. He refuses, but relents after Neilson too meets an ...

Actors : Fun-Ti Ai, Hsiung Chao, Wai-Man Chan, Pei-Shan Chang,
Directors : Chang-hwa Jeong,

Detective Lung is investigating the murder of his father and discovers his father belonged to a syndicate of smugglers. He finds out the murderer used to be his father's business partner ...

Actors : Sven Lindberg, Ernst Günther, Ingvar Kjellson, Ewa Fröling,
Directors : Jan Halldoff,

A stripper from Club Chez Nous is murdered. The killer contacts a newspaper to whitewash himself. Two journalists start to investigate the case and stumble on other crimes along the way.

Actors : Dana, Tony Liu, Nancy Yen, Evelyne Kraft,

Three female detectives--from Hong Kong, Korea, and Singapore--go undercover in a cabaret to expose a murderer.

Actors : Helena Rojo, Jorge Luke, Cameron Mitchell, Isela Vega,
Directors : Alberto Mariscal,

A vengeful widow hires a professional killer to train her son so that he can hunt down and kill the men who murdered her husband. The quest for revenge soon becomes an obsession.

Actors : Eun-ju Im, Man Ting Cheung, Bruce Le, Tao Chiang,
Directors : Joseph Kong,

Sergeant Li teams up with an Interpol agent investigating the death of his brother, He's not Harry, Riggs or Carter, his name Called Bruce and he's seeking revenge.

Actors : Guilin Li, Xiuwu Li, Ke Wei, Jia Liu,

People's Liberation Army soldier Ge Luo investigates the case of the Black Face Bandit among the Hani minority in 1948.

Actors : Paul Chang, Fei Ai, Shen Chan, Ping Chen,
Directors : Yuen Chor,

Master of the "swordplay thriller" genre, Chu Yuan and renowned kung-fu choreographer Tang Chia tell the fabulous tale of the "Fastest Swordsman in the World" facing the "1000 Face Devil" and no less than seven murderers.

Actors : Germán Cobos, Lone Fleming, María Villa, Dyanik Zurakowska,
Directors : Julio Pérez Tabernero,

A movie crew shooting a film featuring a comic-strip hero named The Sexy Cat finds itself stalked by a serial killer who begins murdering the cast and crew.

Actors : Anthony Steffen, Raf Baldassarre, Antonio Pica, María Kosty,
Directors : Juan Bosch,

A british undercover special agent is assigned to investigate the death of a colleague in Lisbon, where he finds out that his colleague was very close to uncover a gang of drug smugglers. ...

Actors : Guomin Zhang, Xiaoyi Chen, Fazeng Guo, Ling He,
Directors : Baochang Guo,

Set in late 1970s, a paintress sketching on Fairy Peak witnesses that two men fight on the cliff edge and calls the police. One of the two fighting men is found murdered that night. Detectives try to find the murderer.

Actors : Robert McCourt, John Harper, Russ Dubuc, Cynthia Stewart,
Directors : Dave Adams,

A psychotic killer escapes from an insane asylum and goes on a killing spree. The SWAT team it sent out to track him down.

Actors : Alain Noury, Konrad Georg, Horst Tappert, Horst Frank,
Directors : Alfred Vohrer,

The son of an Argentine chemist travels to Vienna, to solve the murder of his father. Step by step, he realizes that his father was internationally entangled in secret service machinations ...

Actors : Andrea Camargo, Cláudio Cunha, Sonia Garcia, Sérgio Hingst,
Directors : Roberto Mauro,

When the hooker Rosely is stabbed seven times in the Boca do Lixo, her costumer Manoel is accused of the murder. However, the defense lawyer Gabriel Reis defends Manoel that is released ...