Best Investigation movies of 1964

Actors : Elke Sommer, Herbert Lom, George Sanders, Peter Sellers,
Directors : Blake Edwards,

Inspector Jacques Clouseau investigates the murder of Mr. Benjamin Ballon's driver at a country estate.

Actors : Vincent Price, Derek Francis, Elizabeth Shepherd, John Westbrook,
Directors : Roger Corman,

A man's obsession with his dead wife drives a wedge between him and his new bride.

Actors : Martha Hyer, Lionel Jeffries, Miles Malleson, Edward Judd,
Directors : Nathan Juran,

When a spaceship lands on the moon, it is hailed as a new accomplishment, before it becomes clear that a Victorian party completed the journey in 1899, leading investigators to that mission's last survivor.

Actors : Sharon Walsh, Brett O'Hara, Atlas King, Ray Dennis Steckler,
Directors : Ray Dennis Steckler,

Jerry falls in love with a stripper he meets at a carnival. Little does he know that she is the sister of a gypsy fortune teller whose predictions he had scoffed at earlier. The gypsy turns him into a zombie and he goes on a killing spree.

Actors : Andrew Cruickshank, Charles 'Bud' Tingwell, Ron Moody, Margaret Rutherford,
Directors : George Pollock,

When Miss Marple joins a theatrical company after a blackmailer is murdered, several members of the troupe are also dispatched by this mysterious killer.

Actors : Charles 'Bud' Tingwell, Lionel Jeffries, Margaret Rutherford, William Mervyn,
Directors : George Pollock,

After Miss Marple is made a trustee of a merchant marine training vessel, a fellow trustee is poisoned, and ship's officers are later murdered after she comes on board.

Actors : Victor Buono, Diane Sayer, David McLean, Davey Davison,
Directors : Burt Topper,

An overweight lab technician with low self esteem, brought on by his dominant mother, becomes a serial killer of female nurses.

Actors : Walter Rilla, Richard Häussler, Karin Dor, Joachim Fuchsberger,
Directors : Harald Reinl,

A serial-killer is murdering the ladies of a night club. Detective Gray is seeking for the killer but can only find a lot of gangsters. And the killer is about to act again...

Actors : Victor Francen, Jean-Louis Barrault, Bourvil, Francis Blanche,
Directors : Jean-Pierre Mocky,

Two police inspectors Triquet and Vergus launch their investigations to arrest a dangerous escaped forger named Mickey Le Bénedictin.

Actors : John Carson, Gerald Flood, Yvonne Romain, Peter Vaughan,
Directors : Jim O'Connolly,

A fastidious insurance assessor investigates a potential case of insurance fraud in Brighton and uncovers a murder.

Actors : Lex Barker, Ann Smyrner, Walter Rilla, Ronald Fraser,
Directors : Robert Lynn,

When a millionaires valet is murdered he hires a detective to discover by who and why his valet was killed, leading to connections of the nazi sort!

Actors : Raúl Aubel, Alberto Barcel, Alberto Argibay, Graciela Borges,
Directors : Manuel Antin,

Delia Mañara is notorious in her quarter of Buenos Aires for the mysterious deaths of two of her fiancés. She lives in a twilight world and gains most satisfaction through the exercise of power over others.

Actors : Elizabeth Shepherd, Alexander Davion, Barbara Shelley, William Sylvester,
Directors : Lance Comfort,

When the wife of a blind composer discovers that her husband will cut her out of his estate, if he discovers that she is having an affair with a young artist, she and her lover plan to commit the perfect murder.

Actors : Diana Martín, Bernard Price, Claude Dantes, Tony Kendall,
Directors : Gino Mangini,

A serial killer called "The Hyena" is finally caught and eventually hanged. However, his body disappears before it can be buried, and soon thereafter dead bodies start turning up in a small village.

Actors : Keiji Sada, Michiyo Aratama, Kyôko Kishida, Tsutomu Yamazaki,
Directors : Hiromichi Horikawa,

A Japanese detective, Kikuchi, is framed for a murder and sent to prison. When he is paroled, he joins a private detective agency to investigate his case and investigates Mitsue Takazawa, ...

Actors : John Hoyt, Arlene Martel, Elisha Cook Jr., Bob Kelljan,
Directors : Antonio Santean,

Two detectives investigate the murder of a local businessman by a mysterious woman.

Actors : Roland Carey, Maria Grazia Spina, Mario Feliciani, Gabriele Antonini,
Directors : Guido Malatesta,

A roman consul is sent to Gaul to investigate the theft of gold shipments. He discovers that the gold is being stolen by a tribe of barbarians--whose leader is the governor of Gaul.

Actors : M.G. Ramachandran, Saroja Devi B., Sennalkudi Lakshmi, Ashokan,
Directors : P. Madhavan,

Maran, a police officer, grows up with the belief that his father was killed in a tragic accident. However, when he sets out to investigate a case, he learns that his father leads a terrorist group.

Actors : Sabine Sesselmann, Elga Andersen, Heinz Drache, Ralf Wolter,
Directors : Manfred R. Köhler,

A private detective finds the limp body of a young Chinese beauty in his office, shot with his own gun.

Actors : Paul Klinger, Judith Dornys, Heinz Drache, Ingmar Zeisberg,
Directors : Rudolf Zehetgruber,

A private detective tries to find out how and why some convicts have mysteriously disappeared from the prison of Dartmoor.